Finding the Fourth Proportional to 88,359.90, 132,321.15 and 56,721.30

Step by Step Solution

1. Step 1: Write the proportion equation
   88,359.90 : 132,321.15 = 56,721.30 : x
2. Step 2: Convert to fraction form
   88,359.90/132,321.15 = 56,721.30/x
3. Step 3: Cross multiply
   88,359.90x = 132,321.15 × 56,721.30
4. Step 4: Simplify right side
   88,359.90x = 7,505,427,645.50
5. Step 5: Solve for x
   x = 7,505,427,645.50/88,359.90
6. Step 6: Final answer
   x = 84,941.56