Finding the Fourth Proportional to 99,413.82, 137,154.33 and 59,129.28

Step by Step Solution

1. Step 1: Write the proportion equation
   99,413.82 : 137,154.33 = 59,129.28 : x
2. Step 2: Convert to fraction form
   99,413.82/137,154.33 = 59,129.28/x
3. Step 3: Cross multiply
   99,413.82x = 137,154.33 × 59,129.28
4. Step 4: Simplify right side
   99,413.82x = 8,109,836,781.78
5. Step 5: Solve for x
   x = 8,109,836,781.78/99,413.82
6. Step 6: Final answer
   x = 81,576.55