Finding the Fourth Proportional to 21,702.52, 32,508.42 and 13,871.56

Step by Step Solution

1. Step 1: Write the proportion equation
   21,702.52 : 32,508.42 = 13,871.56 : x
2. Step 2: Convert to fraction form
   21,702.52/32,508.42 = 13,871.56/x
3. Step 3: Cross multiply
   21,702.52x = 32,508.42 × 13,871.56
4. Step 4: Simplify right side
   21,702.52x = 450,942,498.54
5. Step 5: Solve for x
   x = 450,942,498.54/21,702.52
6. Step 6: Final answer
   x = 20,778.35