Finding the Fourth Proportional to 23,153.50, 31,951.72 and 12,543.16

Step by Step Solution

1. Step 1: Write the proportion equation
   23,153.50 : 31,951.72 = 12,543.16 : x
2. Step 2: Convert to fraction form
   23,153.50/31,951.72 = 12,543.16/x
3. Step 3: Cross multiply
   23,153.50x = 31,951.72 × 12,543.16
4. Step 4: Simplify right side
   23,153.50x = 400,775,425.00
5. Step 5: Solve for x
   x = 400,775,425.00/23,153.50
6. Step 6: Final answer
   x = 17,309.50