Finding the Fourth Proportional to 2,738.85, 4,107.47 and 1,439.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,738.85 : 4,107.47 = 1,439.61 : x
2. Step 2: Convert to fraction form
   2,738.85/4,107.47 = 1,439.61/x
3. Step 3: Cross multiply
   2,738.85x = 4,107.47 × 1,439.61
4. Step 4: Simplify right side
   2,738.85x = 5,913,147.69
5. Step 5: Solve for x
   x = 5,913,147.69/2,738.85
6. Step 6: Final answer
   x = 2,158.99