Finding the Fourth Proportional to 23,120.99, 31,906.72 and 12,510.39

Step by Step Solution

1. Step 1: Write the proportion equation
   23,120.99 : 31,906.72 = 12,510.39 : x
2. Step 2: Convert to fraction form
   23,120.99/31,906.72 = 12,510.39/x
3. Step 3: Cross multiply
   23,120.99x = 31,906.72 × 12,510.39
4. Step 4: Simplify right side
   23,120.99x = 399,165,510.82
5. Step 5: Solve for x
   x = 399,165,510.82/23,120.99
6. Step 6: Final answer
   x = 17,264.20