Finding the Fourth Proportional to 31,119.72, 42,943.50 and 17,689.11

Step by Step Solution

1. Step 1: Write the proportion equation
   31,119.72 : 42,943.50 = 17,689.11 : x
2. Step 2: Convert to fraction form
   31,119.72/42,943.50 = 17,689.11/x
3. Step 3: Cross multiply
   31,119.72x = 42,943.50 × 17,689.11
4. Step 4: Simplify right side
   31,119.72x = 759,632,295.29
5. Step 5: Solve for x
   x = 759,632,295.29/31,119.72
6. Step 6: Final answer
   x = 24,410.00