Finding the Fourth Proportional to 12,790.78, 17,651.31 and 7,414.25

Step by Step Solution

1. Step 1: Write the proportion equation
   12,790.78 : 17,651.31 = 7,414.25 : x
2. Step 2: Convert to fraction form
   12,790.78/17,651.31 = 7,414.25/x
3. Step 3: Cross multiply
   12,790.78x = 17,651.31 × 7,414.25
4. Step 4: Simplify right side
   12,790.78x = 130,871,229.25
5. Step 5: Solve for x
   x = 130,871,229.25/12,790.78
6. Step 6: Final answer
   x = 10,231.69