Finding the Fourth Proportional to 22,751.31, 31,399.35 and 12,680.67

Step by Step Solution

1. Step 1: Write the proportion equation
   22,751.31 : 31,399.35 = 12,680.67 : x
2. Step 2: Convert to fraction form
   22,751.31/31,399.35 = 12,680.67/x
3. Step 3: Cross multiply
   22,751.31x = 31,399.35 × 12,680.67
4. Step 4: Simplify right side
   22,751.31x = 398,164,795.56
5. Step 5: Solve for x
   x = 398,164,795.56/22,751.31
6. Step 6: Final answer
   x = 17,500.74