Finding the Fourth Proportional to 12,485.27, 17,229.61 and 7,449.71

Step by Step Solution

1. Step 1: Write the proportion equation
   12,485.27 : 17,229.61 = 7,449.71 : x
2. Step 2: Convert to fraction form
   12,485.27/17,229.61 = 7,449.71/x
3. Step 3: Cross multiply
   12,485.27x = 17,229.61 × 7,449.71
4. Step 4: Simplify right side
   12,485.27x = 128,355,521.08
5. Step 5: Solve for x
   x = 128,355,521.08/12,485.27
6. Step 6: Final answer
   x = 10,280.55