Finding the Fourth Proportional to 31,008.63, 42,790.98 and 17,581.11

Step by Step Solution

1. Step 1: Write the proportion equation
   31,008.63 : 42,790.98 = 17,581.11 : x
2. Step 2: Convert to fraction form
   31,008.63/42,790.98 = 17,581.11/x
3. Step 3: Cross multiply
   31,008.63x = 42,790.98 × 17,581.11
4. Step 4: Simplify right side
   31,008.63x = 752,312,926.39
5. Step 5: Solve for x
   x = 752,312,926.39/31,008.63
6. Step 6: Final answer
   x = 24,261.40