Finding the Fourth Proportional to 123,092.80, 169,867.20 and 72,790.72

Step by Step Solution

1. Step 1: Write the proportion equation
   123,092.80 : 169,867.20 = 72,790.72 : x
2. Step 2: Convert to fraction form
   123,092.80/169,867.20 = 72,790.72/x
3. Step 3: Cross multiply
   123,092.80x = 169,867.20 × 72,790.72
4. Step 4: Simplify right side
   123,092.80x = 12,364,755,792.38
5. Step 5: Solve for x
   x = 12,364,755,792.38/123,092.80
6. Step 6: Final answer
   x = 100,450.68