Finding the Fourth Proportional to 686,630,992.10, 947,435,895.74 and 404,429,620.96

Step by Step Solution

1. Step 1: Write the proportion equation
   686,630,992.10 : 947,435,895.74 = 404,429,620.96 : x
2. Step 2: Convert to fraction form
   686,630,992.10/947,435,895.74 = 404,429,620.96/x
3. Step 3: Cross multiply
   686,630,992.10x = 947,435,895.74 × 404,429,620.96
4. Step 4: Simplify right side
   686,630,992.10x = 383,171,140,196,668,736
5. Step 5: Solve for x
   x = 383,171,140,196,668,736/686,630,992.10
6. Step 6: Final answer
   x = 558,045,215.85