Finding the Fourth Proportional to 21,615.72, 32,399.61 and 9,132.04

Step by Step Solution

1. Step 1: Write the proportion equation
   21,615.72 : 32,399.61 = 9,132.04 : x
2. Step 2: Convert to fraction form
   21,615.72/32,399.61 = 9,132.04/x
3. Step 3: Cross multiply
   21,615.72x = 32,399.61 × 9,132.04
4. Step 4: Simplify right side
   21,615.72x = 295,874,534.50
5. Step 5: Solve for x
   x = 295,874,534.50/21,615.72
6. Step 6: Final answer
   x = 13,687.93