Finding the Fourth Proportional to 12,456.27, 17,186.18 and 7,149.15

Step by Step Solution

1. Step 1: Write the proportion equation
   12,456.27 : 17,186.18 = 7,149.15 : x
2. Step 2: Convert to fraction form
   12,456.27/17,186.18 = 7,149.15/x
3. Step 3: Cross multiply
   12,456.27x = 17,186.18 × 7,149.15
4. Step 4: Simplify right side
   12,456.27x = 122,866,543.00
5. Step 5: Solve for x
   x = 122,866,543.00/12,456.27
6. Step 6: Final answer
   x = 9,863.83