Finding the Fourth Proportional to 123,057.92, 169,862.12 and 72,087

Step by Step Solution

1. Step 1: Write the proportion equation
   123,057.92 : 169,862.12 = 72,087 : x
2. Step 2: Convert to fraction form
   123,057.92/169,862.12 = 72,087/x
3. Step 3: Cross multiply
   123,057.92x = 169,862.12 × 72,087
4. Step 4: Simplify right side
   123,057.92x = 12,244,850,284.01
5. Step 5: Solve for x
   x = 12,244,850,284.01/123,057.92
6. Step 6: Final answer
   x = 99,504.78