Finding the Fourth Proportional to 1,439.24, 1,985.46 and 1,025.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,439.24 : 1,985.46 = 1,025.48 : x
2. Step 2: Convert to fraction form
   1,439.24/1,985.46 = 1,025.48/x
3. Step 3: Cross multiply
   1,439.24x = 1,985.46 × 1,025.48
4. Step 4: Simplify right side
   1,439.24x = 2,036,049.52
5. Step 5: Solve for x
   x = 2,036,049.52/1,439.24
6. Step 6: Final answer
   x = 1,414.67