Finding the Fourth Proportional to 408,499.50, 563,729.31 and 229,651.50

Step by Step Solution

1. Step 1: Write the proportion equation
   408,499.50 : 563,729.31 = 229,651.50 : x
2. Step 2: Convert to fraction form
   408,499.50/563,729.31 = 229,651.50/x
3. Step 3: Cross multiply
   408,499.50x = 563,729.31 × 229,651.50
4. Step 4: Simplify right side
   408,499.50x = 129,461,281,635.47
5. Step 5: Solve for x
   x = 129,461,281,635.47/408,499.50
6. Step 6: Final answer
   x = 316,919.07