Finding the Fourth Proportional to 12,480.57, 17,223.18 and 7,177.10

Step by Step Solution

1. Step 1: Write the proportion equation
   12,480.57 : 17,223.18 = 7,177.10 : x
2. Step 2: Convert to fraction form
   12,480.57/17,223.18 = 7,177.10/x
3. Step 3: Cross multiply
   12,480.57x = 17,223.18 × 7,177.10
4. Step 4: Simplify right side
   12,480.57x = 123,612,399.06
5. Step 5: Solve for x
   x = 123,612,399.06/12,480.57
6. Step 6: Final answer
   x = 9,904.39