Finding the Fourth Proportional to 21,380.71, 32,077.98 and 10,285.96

Step by Step Solution

1. Step 1: Write the proportion equation
   21,380.71 : 32,077.98 = 10,285.96 : x
2. Step 2: Convert to fraction form
   21,380.71/32,077.98 = 10,285.96/x
3. Step 3: Cross multiply
   21,380.71x = 32,077.98 × 10,285.96
4. Step 4: Simplify right side
   21,380.71x = 329,952,819.16
5. Step 5: Solve for x
   x = 329,952,819.16/21,380.71
6. Step 6: Final answer
   x = 15,432.27