Finding the Fourth Proportional to 3,912.34, 5,399.05 and 2,144.05

Step by Step Solution

1. Step 1: Write the proportion equation
   3,912.34 : 5,399.05 = 2,144.05 : x
2. Step 2: Convert to fraction form
   3,912.34/5,399.05 = 2,144.05/x
3. Step 3: Cross multiply
   3,912.34x = 5,399.05 × 2,144.05
4. Step 4: Simplify right side
   3,912.34x = 11,575,833.15
5. Step 5: Solve for x
   x = 11,575,833.15/3,912.34
6. Step 6: Final answer
   x = 2,958.80