Finding the Fourth Proportional to 9,128.04, 12,596.49 and 5,149.05

Step by Step Solution

1. Step 1: Write the proportion equation
   9,128.04 : 12,596.49 = 5,149.05 : x
2. Step 2: Convert to fraction form
   9,128.04/12,596.49 = 5,149.05/x
3. Step 3: Cross multiply
   9,128.04x = 12,596.49 × 5,149.05
4. Step 4: Simplify right side
   9,128.04x = 64,859,956.83
5. Step 5: Solve for x
   x = 64,859,956.83/9,128.04
6. Step 6: Final answer
   x = 7,105.57