Finding the Fourth Proportional to 82,911.50, 124,355.12 and 40,780.29

Step by Step Solution

1. Step 1: Write the proportion equation
   82,911.50 : 124,355.12 = 40,780.29 : x
2. Step 2: Convert to fraction form
   82,911.50/124,355.12 = 40,780.29/x
3. Step 3: Cross multiply
   82,911.50x = 124,355.12 × 40,780.29
4. Step 4: Simplify right side
   82,911.50x = 5,071,237,413.85
5. Step 5: Solve for x
   x = 5,071,237,413.85/82,911.50
6. Step 6: Final answer
   x = 61,164.46