Finding the Fourth Proportional to 9,144.38, 12,619.59 and 5,165.93

Step by Step Solution

1. Step 1: Write the proportion equation
   9,144.38 : 12,619.59 = 5,165.93 : x
2. Step 2: Convert to fraction form
   9,144.38/12,619.59 = 5,165.93/x
3. Step 3: Cross multiply
   9,144.38x = 12,619.59 × 5,165.93
4. Step 4: Simplify right side
   9,144.38x = 65,191,918.57
5. Step 5: Solve for x
   x = 65,191,918.57/9,144.38
6. Step 6: Final answer
   x = 7,129.18