Finding the Fourth Proportional to 59,315.12, 89,385.32 and 53,694.50

Step by Step Solution

1. Step 1: Write the proportion equation
   59,315.12 : 89,385.32 = 53,694.50 : x
2. Step 2: Convert to fraction form
   59,315.12/89,385.32 = 53,694.50/x
3. Step 3: Cross multiply
   59,315.12x = 89,385.32 × 53,694.50
4. Step 4: Simplify right side
   59,315.12x = 4,799,500,019.73
5. Step 5: Solve for x
   x = 4,799,500,019.73/59,315.12
6. Step 6: Final answer
   x = 80,915.28