Finding the Fourth Proportional to 91,432.31, 137,105.39 and 59,359.50

Step by Step Solution

1. Step 1: Write the proportion equation
   91,432.31 : 137,105.39 = 59,359.50 : x
2. Step 2: Convert to fraction form
   91,432.31/137,105.39 = 59,359.50/x
3. Step 3: Cross multiply
   91,432.31x = 137,105.39 × 59,359.50
4. Step 4: Simplify right side
   91,432.31x = 8,138,507,397.71
5. Step 5: Solve for x
   x = 8,138,507,397.71/91,432.31
6. Step 6: Final answer
   x = 89,011.28