Finding the Fourth Proportional to 22,716.24, 31,348.04 and 12,780.24

Step by Step Solution

1. Step 1: Write the proportion equation
   22,716.24 : 31,348.04 = 12,780.24 : x
2. Step 2: Convert to fraction form
   22,716.24/31,348.04 = 12,780.24/x
3. Step 3: Cross multiply
   22,716.24x = 31,348.04 × 12,780.24
4. Step 4: Simplify right side
   22,716.24x = 400,635,474.73
5. Step 5: Solve for x
   x = 400,635,474.73/22,716.24
6. Step 6: Final answer
   x = 17,636.52