Finding the Fourth Proportional to 9,128.54, 12,597.18 and 5,149.56

Step by Step Solution

1. Step 1: Write the proportion equation
   9,128.54 : 12,597.18 = 5,149.56 : x
2. Step 2: Convert to fraction form
   9,128.54/12,597.18 = 5,149.56/x
3. Step 3: Cross multiply
   9,128.54x = 12,597.18 × 5,149.56
4. Step 4: Simplify right side
   9,128.54x = 64,869,934.24
5. Step 5: Solve for x
   x = 64,869,934.24/9,128.54
6. Step 6: Final answer
   x = 7,106.28