Finding the Fourth Proportional to 22,751.88, 31,399.02 and 12,680.16

Step by Step Solution

1. Step 1: Write the proportion equation
   22,751.88 : 31,399.02 = 12,680.16 : x
2. Step 2: Convert to fraction form
   22,751.88/31,399.02 = 12,680.16/x
3. Step 3: Cross multiply
   22,751.88x = 31,399.02 × 12,680.16
4. Step 4: Simplify right side
   22,751.88x = 398,144,597.44
5. Step 5: Solve for x
   x = 398,144,597.44/22,751.88
6. Step 6: Final answer
   x = 17,499.42