Finding the Fourth Proportional to 23,331.16, 32,196.30 and 12,721

Step by Step Solution

1. Step 1: Write the proportion equation
   23,331.16 : 32,196.30 = 12,721 : x
2. Step 2: Convert to fraction form
   23,331.16/32,196.30 = 12,721/x
3. Step 3: Cross multiply
   23,331.16x = 32,196.30 × 12,721
4. Step 4: Simplify right side
   23,331.16x = 409,569,132.30
5. Step 5: Solve for x
   x = 409,569,132.30/23,331.16
6. Step 6: Final answer
   x = 17,554.60