Finding the Fourth Proportional to 59,128.72, 88,758.42 and 58,909.48

Step by Step Solution

1. Step 1: Write the proportion equation
   59,128.72 : 88,758.42 = 58,909.48 : x
2. Step 2: Convert to fraction form
   59,128.72/88,758.42 = 58,909.48/x
3. Step 3: Cross multiply
   59,128.72x = 88,758.42 × 58,909.48
4. Step 4: Simplify right side
   59,128.72x = 5,228,712,367.82
5. Step 5: Solve for x
   x = 5,228,712,367.82/59,128.72
6. Step 6: Final answer
   x = 88,429.32