Finding the Fourth Proportional to 31,728.71, 43,785.62 and 17,581.56

Step by Step Solution

1. Step 1: Write the proportion equation
   31,728.71 : 43,785.62 = 17,581.56 : x
2. Step 2: Convert to fraction form
   31,728.71/43,785.62 = 17,581.56/x
3. Step 3: Cross multiply
   31,728.71x = 43,785.62 × 17,581.56
4. Step 4: Simplify right side
   31,728.71x = 769,819,308.22
5. Step 5: Solve for x
   x = 769,819,308.22/31,728.71
6. Step 6: Final answer
   x = 24,262.55