Finding the Fourth Proportional to 663,606.20, 915,737.10 and 377,086.52

Step by Step Solution

1. Step 1: Write the proportion equation
   663,606.20 : 915,737.10 = 377,086.52 : x
2. Step 2: Convert to fraction form
   663,606.20/915,737.10 = 377,086.52/x
3. Step 3: Cross multiply
   663,606.20x = 915,737.10 × 377,086.52
4. Step 4: Simplify right side
   663,606.20x = 345,312,116,273.89
5. Step 5: Solve for x
   x = 345,312,116,273.89/663,606.20
6. Step 6: Final answer
   x = 520,356.98