Finding the Fourth Proportional to 9,142.16, 12,616.18 and 5,163.54

Step by Step Solution

1. Step 1: Write the proportion equation
   9,142.16 : 12,616.18 = 5,163.54 : x
2. Step 2: Convert to fraction form
   9,142.16/12,616.18 = 5,163.54/x
3. Step 3: Cross multiply
   9,142.16x = 12,616.18 × 5,163.54
4. Step 4: Simplify right side
   9,142.16x = 65,144,150.08
5. Step 5: Solve for x
   x = 65,144,150.08/9,142.16
6. Step 6: Final answer
   x = 7,125.68