Finding the Fourth Proportional to 22,862.78, 31,536.51 and 15,689.42

Step by Step Solution

1. Step 1: Write the proportion equation
   22,862.78 : 31,536.51 = 15,689.42 : x
2. Step 2: Convert to fraction form
   22,862.78/31,536.51 = 15,689.42/x
3. Step 3: Cross multiply
   22,862.78x = 31,536.51 × 15,689.42
4. Step 4: Simplify right side
   22,862.78x = 494,789,550.72
5. Step 5: Solve for x
   x = 494,789,550.72/22,862.78
6. Step 6: Final answer
   x = 21,641.71