Finding the Fourth Proportional to 2,434.56, 3,359.25 and 1,439.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,434.56 : 3,359.25 = 1,439.78 : x
2. Step 2: Convert to fraction form
   2,434.56/3,359.25 = 1,439.78/x
3. Step 3: Cross multiply
   2,434.56x = 3,359.25 × 1,439.78
4. Step 4: Simplify right side
   2,434.56x = 4,836,560.12
5. Step 5: Solve for x
   x = 4,836,560.12/2,434.56
6. Step 6: Final answer
   x = 1,986.63