Finding the Fourth Proportional to 654,139.30, 913,695.50 and 654,139.30

Step by Step Solution

1. Step 1: Write the proportion equation
   654,139.30 : 913,695.50 = 654,139.30 : x
2. Step 2: Convert to fraction form
   654,139.30/913,695.50 = 654,139.30/x
3. Step 3: Cross multiply
   654,139.30x = 913,695.50 × 654,139.30
4. Step 4: Simplify right side
   654,139.30x = 597,684,134,783.15
5. Step 5: Solve for x
   x = 597,684,134,783.15/654,139.30
6. Step 6: Final answer
   x = 913,695.50