To estimate the S&P-adjusted FFO-to-debt ratio for Bouygues for 2022, we follow the prescribed workflow based on the provided financial data.

### 1. Identify the industry
Bouygues is a diversified group with operations in construction, telecommunications, and media. Given the mix of activities, we apply the general corporate baseline methodology.

### 2. Estimate Adjusted_EBITDA
*   **Reported EBITDA (reconstructed):**
    *   Operating profit: 1,872,000,000 EUR
    *   Add: Depreciation & Amortization (PPE & Intangible): 2,228,000,000 EUR
    *   Add: Depreciation (Right-of-use assets): 446,000,000 EUR
    *   Add: Net non-recurring expense (183M - 93M): 90,000,000 EUR
    *   Total EBITDA ≈ 4,636,000,000 EUR
*   **Lease Adjustment:** Under S&P methodology, lease interest is often separated. Since IFRS 16 is applied, we adjust by adding back lease depreciation and interest if necessary, but the reported Operating Profit already reflects these. S&P typically adds back lease depreciation to EBITDA.
    *   Adjusted_EBITDA = 4,636,000,000 + 446,000,000 = 5,082,000,000 EUR

### 3. Estimate FFO
*   **FFO = Adjusted_EBITDA - cash_interest - cash_taxes**
*   **Cash Interest:** The reported cost of net debt is 198M EUR. We use this as the primary interest component.
*   **Cash Taxes:** Income taxes paid (from operating activities) = 518,000,000 EUR.
*   FFO = 5,082,000,000 - 198,000,000 - 518,000,000 = 4,366,000,000 EUR.

### 4. Estimate Adjusted_Debt
*   **Total Debt:**
    *   Long-term borrowings: 5,805,000,000 EUR
    *   Current borrowings: 1,324,000,000 EUR
    *   Current bank overdrafts: 351,000,000 EUR
    *   Lease liabilities (Non-current 1,473M + Current 362M) = 1,835,000,000 EUR
    *   Reported Debt = 5,805 + 1,324 + 351 + 1,835 = 9,315,000,000 EUR.
*   **Cash and Cash Equivalents:** 6,501,000,000 EUR.
*   **Adjusted_Debt = Total Debt - Cash = 9,315,000,000 - 6,501,000,000 = 2,814,000,000 EUR.**

### 5. Calculate FFO / Adjusted_Debt
*   FFO / Adjusted_Debt = 4,366,000,000 / 2,814,000,000 = 1.551528...

Rounding to four decimal places: 1.5515.

<answer>1.5515</answer>