Finding the Fourth Proportional to 23,120.47, 31,906.20 and 12,510.10

Step by Step Solution

1. Step 1: Write the proportion equation
   23,120.47 : 31,906.20 = 12,510.10 : x
2. Step 2: Convert to fraction form
   23,120.47/31,906.20 = 12,510.10/x
3. Step 3: Cross multiply
   23,120.47x = 31,906.20 × 12,510.10
4. Step 4: Simplify right side
   23,120.47x = 399,149,752.62
5. Step 5: Solve for x
   x = 399,149,752.62/23,120.47
6. Step 6: Final answer
   x = 17,263.91