Finding the Fourth Proportional to 663,605.83, 915,736.58 and 377,086.15

Step by Step Solution

1. Step 1: Write the proportion equation
   663,605.83 : 915,736.58 = 377,086.15 : x
2. Step 2: Convert to fraction form
   663,605.83/915,736.58 = 377,086.15/x
3. Step 3: Cross multiply
   663,605.83x = 915,736.58 × 377,086.15
4. Step 4: Simplify right side
   663,605.83x = 345,311,581,366.37
5. Step 5: Solve for x
   x = 345,311,581,366.37/663,605.83
6. Step 6: Final answer
   x = 520,356.46