Finding the Fourth Proportional to 3,912.92, 5,399.83 and 2,144.69

Step by Step Solution

1. Step 1: Write the proportion equation
   3,912.92 : 5,399.83 = 2,144.69 : x
2. Step 2: Convert to fraction form
   3,912.92/5,399.83 = 2,144.69/x
3. Step 3: Cross multiply
   3,912.92x = 5,399.83 × 2,144.69
4. Step 4: Simplify right side
   3,912.92x = 11,580,961.40
5. Step 5: Solve for x
   x = 11,580,961.40/3,912.92
6. Step 6: Final answer
   x = 2,959.67