Finding the Fourth Proportional to 21,123.81, 31,672.98 and 14,542.83

Step by Step Solution

1. Step 1: Write the proportion equation
   21,123.81 : 31,672.98 = 14,542.83 : x
2. Step 2: Convert to fraction form
   21,123.81/31,672.98 = 14,542.83/x
3. Step 3: Cross multiply
   21,123.81x = 31,672.98 × 14,542.83
4. Step 4: Simplify right side
   21,123.81x = 460,614,763.73
5. Step 5: Solve for x
   x = 460,614,763.73/21,123.81
6. Step 6: Final answer
   x = 21,805.48