Finding the Fourth Proportional to 2,440.50, 3,367.89 and 1,392.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,440.50 : 3,367.89 = 1,392.59 : x
2. Step 2: Convert to fraction form
   2,440.50/3,367.89 = 1,392.59/x
3. Step 3: Cross multiply
   2,440.50x = 3,367.89 × 1,392.59
4. Step 4: Simplify right side
   2,440.50x = 4,690,073.10
5. Step 5: Solve for x
   x = 4,690,073.10/2,440.50
6. Step 6: Final answer
   x = 1,921.77