Finding the Fourth Proportional to 2,388.38, 3,295.96 and 1,340.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,388.38 : 3,295.96 = 1,340.78 : x
2. Step 2: Convert to fraction form
   2,388.38/3,295.96 = 1,340.78/x
3. Step 3: Cross multiply
   2,388.38x = 3,295.96 × 1,340.78
4. Step 4: Simplify right side
   2,388.38x = 4,419,137.42
5. Step 5: Solve for x
   x = 4,419,137.42/2,388.38
6. Step 6: Final answer
   x = 1,850.27