Finding the Fourth Proportional to 22,872.72, 31,633.92 and 20,514

Step by Step Solution

1. Step 1: Write the proportion equation
   22,872.72 : 31,633.92 = 20,514 : x
2. Step 2: Convert to fraction form
   22,872.72/31,633.92 = 20,514/x
3. Step 3: Cross multiply
   22,872.72x = 31,633.92 × 20,514
4. Step 4: Simplify right side
   22,872.72x = 648,938,234.88
5. Step 5: Solve for x
   x = 648,938,234.88/22,872.72
6. Step 6: Final answer
   x = 28,371.71