Finding the Fourth Proportional to 22,510.47, 31,062.85 and 12,438.80

Step by Step Solution

1. Step 1: Write the proportion equation
   22,510.47 : 31,062.85 = 12,438.80 : x
2. Step 2: Convert to fraction form
   22,510.47/31,062.85 = 12,438.80/x
3. Step 3: Cross multiply
   22,510.47x = 31,062.85 × 12,438.80
4. Step 4: Simplify right side
   22,510.47x = 386,384,578.58
5. Step 5: Solve for x
   x = 386,384,578.58/22,510.47
6. Step 6: Final answer
   x = 17,164.66