Finding the Fourth Proportional to 22,510.72, 31,065.13 and 12,439.39

Step by Step Solution

1. Step 1: Write the proportion equation
   22,510.72 : 31,065.13 = 12,439.39 : x
2. Step 2: Convert to fraction form
   22,510.72/31,065.13 = 12,439.39/x
3. Step 3: Cross multiply
   22,510.72x = 31,065.13 × 12,439.39
4. Step 4: Simplify right side
   22,510.72x = 386,431,267.47
5. Step 5: Solve for x
   x = 386,431,267.47/22,510.72
6. Step 6: Final answer
   x = 17,166.54