Finding the Fourth Proportional to 9,128.08, 12,596.78 and 5,149.19

Step by Step Solution

1. Step 1: Write the proportion equation
   9,128.08 : 12,596.78 = 5,149.19 : x
2. Step 2: Convert to fraction form
   9,128.08/12,596.78 = 5,149.19/x
3. Step 3: Cross multiply
   9,128.08x = 12,596.78 × 5,149.19
4. Step 4: Simplify right side
   9,128.08x = 64,863,213.61
5. Step 5: Solve for x
   x = 64,863,213.61/9,128.08
6. Step 6: Final answer
   x = 7,105.90