Finding the Fourth Proportional to 82,413.71, 124,238.25 and 76,920.86

Step by Step Solution

1. Step 1: Write the proportion equation
   82,413.71 : 124,238.25 = 76,920.86 : x
2. Step 2: Convert to fraction form
   82,413.71/124,238.25 = 76,920.86/x
3. Step 3: Cross multiply
   82,413.71x = 124,238.25 × 76,920.86
4. Step 4: Simplify right side
   82,413.71x = 9,556,513,034.90
5. Step 5: Solve for x
   x = 9,556,513,034.90/82,413.71
6. Step 6: Final answer
   x = 115,957.81