Finding the Fourth Proportional to 3,912.57, 5,399.33 and 2,144.12

Step by Step Solution

1. Step 1: Write the proportion equation
   3,912.57 : 5,399.33 = 2,144.12 : x
2. Step 2: Convert to fraction form
   3,912.57/5,399.33 = 2,144.12/x
3. Step 3: Cross multiply
   3,912.57x = 5,399.33 × 2,144.12
4. Step 4: Simplify right side
   3,912.57x = 11,576,773.72
5. Step 5: Solve for x
   x = 11,576,773.72/3,912.57
6. Step 6: Final answer
   x = 2,958.87