Finding the Fourth Proportional to 31,728.18, 43,782.48 and 17,580.72

Step by Step Solution

1. Step 1: Write the proportion equation
   31,728.18 : 43,782.48 = 17,580.72 : x
2. Step 2: Convert to fraction form
   31,728.18/43,782.48 = 17,580.72/x
3. Step 3: Cross multiply
   31,728.18x = 43,782.48 × 17,580.72
4. Step 4: Simplify right side
   31,728.18x = 769,727,521.79
5. Step 5: Solve for x
   x = 769,727,521.79/31,728.18
6. Step 6: Final answer
   x = 24,260.06