Finding the Fourth Proportional to 12,731.59, 17,570.55 and 7,425.28

Step by Step Solution

1. Step 1: Write the proportion equation
   12,731.59 : 17,570.55 = 7,425.28 : x
2. Step 2: Convert to fraction form
   12,731.59/17,570.55 = 7,425.28/x
3. Step 3: Cross multiply
   12,731.59x = 17,570.55 × 7,425.28
4. Step 4: Simplify right side
   12,731.59x = 130,466,253.50
5. Step 5: Solve for x
   x = 130,466,253.50/12,731.59
6. Step 6: Final answer
   x = 10,247.44