Finding the Fourth Proportional to 22,757.78, 31,401.92 and 12,684.02

Step by Step Solution

1. Step 1: Write the proportion equation
   22,757.78 : 31,401.92 = 12,684.02 : x
2. Step 2: Convert to fraction form
   22,757.78/31,401.92 = 12,684.02/x
3. Step 3: Cross multiply
   22,757.78x = 31,401.92 × 12,684.02
4. Step 4: Simplify right side
   22,757.78x = 398,302,360.89
5. Step 5: Solve for x
   x = 398,302,360.89/22,757.78
6. Step 6: Final answer
   x = 17,501.81