Finding the Fourth Proportional to 23,540.96, 32,484.72 and 12,931.28

Step by Step Solution

1. Step 1: Write the proportion equation
   23,540.96 : 32,484.72 = 12,931.28 : x
2. Step 2: Convert to fraction form
   23,540.96/32,484.72 = 12,931.28/x
3. Step 3: Cross multiply
   23,540.96x = 32,484.72 × 12,931.28
4. Step 4: Simplify right side
   23,540.96x = 420,069,010.04
5. Step 5: Solve for x
   x = 420,069,010.04/23,540.96
6. Step 6: Final answer
   x = 17,844.18