Finding the Fourth Proportional to 23,153.43, 31,951.62 and 12,543.15

Step by Step Solution

1. Step 1: Write the proportion equation
   23,153.43 : 31,951.62 = 12,543.15 : x
2. Step 2: Convert to fraction form
   23,153.43/31,951.62 = 12,543.15/x
3. Step 3: Cross multiply
   23,153.43x = 31,951.62 × 12,543.15
4. Step 4: Simplify right side
   23,153.43x = 400,773,962.40
5. Step 5: Solve for x
   x = 400,773,962.40/23,153.43
6. Step 6: Final answer
   x = 17,309.49