Finding the Fourth Proportional to 12,425.28, 17,141.76 and 7,118.88

Step by Step Solution

1. Step 1: Write the proportion equation
   12,425.28 : 17,141.76 = 7,118.88 : x
2. Step 2: Convert to fraction form
   12,425.28/17,141.76 = 7,118.88/x
3. Step 3: Cross multiply
   12,425.28x = 17,141.76 × 7,118.88
4. Step 4: Simplify right side
   12,425.28x = 122,030,132.43
5. Step 5: Solve for x
   x = 122,030,132.43/12,425.28
6. Step 6: Final answer
   x = 9,821.12