Finding the Fourth Proportional to 637,015,839.24, 879,025,788.72 and 354,736,949.88

Step by Step Solution

1. Step 1: Write the proportion equation
   637,015,839.24 : 879,025,788.72 = 354,736,949.88 : x
2. Step 2: Convert to fraction form
   637,015,839.24/879,025,788.72 = 354,736,949.88/x
3. Step 3: Cross multiply
   637,015,839.24x = 879,025,788.72 × 354,736,949.88
4. Step 4: Simplify right side
   637,015,839.24x = 311,822,927,156,394,112
5. Step 5: Solve for x
   x = 311,822,927,156,394,112/637,015,839.24
6. Step 6: Final answer
   x = 489,505,767.28