Finding the Fourth Proportional to 9,144.52, 12,619.15 and 5,165.39

Step by Step Solution

1. Step 1: Write the proportion equation
   9,144.52 : 12,619.15 = 5,165.39 : x
2. Step 2: Convert to fraction form
   9,144.52/12,619.15 = 5,165.39/x
3. Step 3: Cross multiply
   9,144.52x = 12,619.15 × 5,165.39
4. Step 4: Simplify right side
   9,144.52x = 65,182,849.85
5. Step 5: Solve for x
   x = 65,182,849.85/9,144.52
6. Step 6: Final answer
   x = 7,128.08