Finding the Fourth Proportional to 12,331.55, 17,016.56 and 7,549.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,331.55 : 17,016.56 = 7,549.50 : x
2. Step 2: Convert to fraction form
   12,331.55/17,016.56 = 7,549.50/x
3. Step 3: Cross multiply
   12,331.55x = 17,016.56 × 7,549.50
4. Step 4: Simplify right side
   12,331.55x = 128,466,574.10
5. Step 5: Solve for x
   x = 128,466,574.10/12,331.55
6. Step 6: Final answer
   x = 10,417.71