Finding the Fourth Proportional to 21,437.12, 32,142.72 and 14,490.56

Step by Step Solution

1. Step 1: Write the proportion equation
   21,437.12 : 32,142.72 = 14,490.56 : x
2. Step 2: Convert to fraction form
   21,437.12/32,142.72 = 14,490.56/x
3. Step 3: Cross multiply
   21,437.12x = 32,142.72 × 14,490.56
4. Step 4: Simplify right side
   21,437.12x = 465,766,012.72
5. Step 5: Solve for x
   x = 465,766,012.72/21,437.12
6. Step 6: Final answer
   x = 21,727.08