Finding the Fourth Proportional to 61,042.80, 91,704.91 and 58,520.59

Step by Step Solution

1. Step 1: Write the proportion equation
   61,042.80 : 91,704.91 = 58,520.59 : x
2. Step 2: Convert to fraction form
   61,042.80/91,704.91 = 58,520.59/x
3. Step 3: Cross multiply
   61,042.80x = 91,704.91 × 58,520.59
4. Step 4: Simplify right side
   61,042.80x = 5,366,625,689.10
5. Step 5: Solve for x
   x = 5,366,625,689.10/61,042.80
6. Step 6: Final answer
   x = 87,915.79