Finding the Fourth Proportional to 9,128.27, 12,596.68 and 5,149.15

Step by Step Solution

1. Step 1: Write the proportion equation
   9,128.27 : 12,596.68 = 5,149.15 : x
2. Step 2: Convert to fraction form
   9,128.27/12,596.68 = 5,149.15/x
3. Step 3: Cross multiply
   9,128.27x = 12,596.68 × 5,149.15
4. Step 4: Simplify right side
   9,128.27x = 64,862,194.82
5. Step 5: Solve for x
   x = 64,862,194.82/9,128.27
6. Step 6: Final answer
   x = 7,105.64