Finding the Fourth Proportional to 2,440.96, 3,368.24 and 1,392.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,440.96 : 3,368.24 = 1,392.72 : x
2. Step 2: Convert to fraction form
   2,440.96/3,368.24 = 1,392.72/x
3. Step 3: Cross multiply
   2,440.96x = 3,368.24 × 1,392.72
4. Step 4: Simplify right side
   2,440.96x = 4,691,015.21
5. Step 5: Solve for x
   x = 4,691,015.21/2,440.96
6. Step 6: Final answer
   x = 1,921.79