Finding the Fourth Proportional to 2,740.28, 4,103.10 and 1,439.01

Step by Step Solution

1. Step 1: Write the proportion equation
   2,740.28 : 4,103.10 = 1,439.01 : x
2. Step 2: Convert to fraction form
   2,740.28/4,103.10 = 1,439.01/x
3. Step 3: Cross multiply
   2,740.28x = 4,103.10 × 1,439.01
4. Step 4: Simplify right side
   2,740.28x = 5,904,401.93
5. Step 5: Solve for x
   x = 5,904,401.93/2,740.28
6. Step 6: Final answer
   x = 2,154.67