Finding the Fourth Proportional to 22,689.82, 31,253.30 and 15,871.78

Step by Step Solution

1. Step 1: Write the proportion equation
   22,689.82 : 31,253.30 = 15,871.78 : x
2. Step 2: Convert to fraction form
   22,689.82/31,253.30 = 15,871.78/x
3. Step 3: Cross multiply
   22,689.82x = 31,253.30 × 15,871.78
4. Step 4: Simplify right side
   22,689.82x = 496,045,422.52
5. Step 5: Solve for x
   x = 496,045,422.52/22,689.82
6. Step 6: Final answer
   x = 21,862.03