Finding the Fourth Proportional to 90,459.52, 124,689.90 and 71,308.06

Step by Step Solution

1. Step 1: Write the proportion equation
   90,459.52 : 124,689.90 = 71,308.06 : x
2. Step 2: Convert to fraction form
   90,459.52/124,689.90 = 71,308.06/x
3. Step 3: Cross multiply
   90,459.52x = 124,689.90 × 71,308.06
4. Step 4: Simplify right side
   90,459.52x = 8,891,394,870.59
5. Step 5: Solve for x
   x = 8,891,394,870.59/90,459.52
6. Step 6: Final answer
   x = 98,291.42