Finding the Fourth Proportional to 2,440.36, 3,367.71 and 1,392.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,440.36 : 3,367.71 = 1,392.42 : x
2. Step 2: Convert to fraction form
   2,440.36/3,367.71 = 1,392.42/x
3. Step 3: Cross multiply
   2,440.36x = 3,367.71 × 1,392.42
4. Step 4: Simplify right side
   2,440.36x = 4,689,259.80
5. Step 5: Solve for x
   x = 4,689,259.80/2,440.36
6. Step 6: Final answer
   x = 1,921.55