Finding the Fourth Proportional to 861,059.16, 1,188,243.27 and 498,498.30

Step by Step Solution

1. Step 1: Write the proportion equation
   861,059.16 : 1,188,243.27 = 498,498.30 : x
2. Step 2: Convert to fraction form
   861,059.16/1,188,243.27 = 498,498.30/x
3. Step 3: Cross multiply
   861,059.16x = 1,188,243.27 × 498,498.30
4. Step 4: Simplify right side
   861,059.16x = 592,337,250,081.44
5. Step 5: Solve for x
   x = 592,337,250,081.44/861,059.16
6. Step 6: Final answer
   x = 687,917.02