Finding the Fourth Proportional to 31,008.13, 42,790.29 and 17,580.61

Step by Step Solution

1. Step 1: Write the proportion equation
   31,008.13 : 42,790.29 = 17,580.61 : x
2. Step 2: Convert to fraction form
   31,008.13/42,790.29 = 17,580.61/x
3. Step 3: Cross multiply
   31,008.13x = 42,790.29 × 17,580.61
4. Step 4: Simplify right side
   31,008.13x = 752,279,400.28
5. Step 5: Solve for x
   x = 752,279,400.28/31,008.13
6. Step 6: Final answer
   x = 24,260.71