Finding the Fourth Proportional to 2,440.30, 3,367.56 and 1,392.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,440.30 : 3,367.56 = 1,392.25 : x
2. Step 2: Convert to fraction form
   2,440.30/3,367.56 = 1,392.25/x
3. Step 3: Cross multiply
   2,440.30x = 3,367.56 × 1,392.25
4. Step 4: Simplify right side
   2,440.30x = 4,688,485.41
5. Step 5: Solve for x
   x = 4,688,485.41/2,440.30
6. Step 6: Final answer
   x = 1,921.27