Finding the Fourth Proportional to 3,912.56, 5,399.32 and 2,144.18

Step by Step Solution

1. Step 1: Write the proportion equation
   3,912.56 : 5,399.32 = 2,144.18 : x
2. Step 2: Convert to fraction form
   3,912.56/5,399.32 = 2,144.18/x
3. Step 3: Cross multiply
   3,912.56x = 5,399.32 × 2,144.18
4. Step 4: Simplify right side
   3,912.56x = 11,577,113.96
5. Step 5: Solve for x
   x = 11,577,113.96/3,912.56
6. Step 6: Final answer
   x = 2,958.96