Finding the Fourth Proportional to 31,728.69, 43,785.63 and 17,581.50

Step by Step Solution

1. Step 1: Write the proportion equation
   31,728.69 : 43,785.63 = 17,581.50 : x
2. Step 2: Convert to fraction form
   31,728.69/43,785.63 = 17,581.50/x
3. Step 3: Cross multiply
   31,728.69x = 43,785.63 × 17,581.50
4. Step 4: Simplify right side
   31,728.69x = 769,817,053.85
5. Step 5: Solve for x
   x = 769,817,053.85/31,728.69
6. Step 6: Final answer
   x = 24,262.49