Finding the Fourth Proportional to 2,456.78, 3,390.28 and 1,337.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,456.78 : 3,390.28 = 1,337.69 : x
2. Step 2: Convert to fraction form
   2,456.78/3,390.28 = 1,337.69/x
3. Step 3: Cross multiply
   2,456.78x = 3,390.28 × 1,337.69
4. Step 4: Simplify right side
   2,456.78x = 4,535,138.52
5. Step 5: Solve for x
   x = 4,535,138.52/2,456.78
6. Step 6: Final answer
   x = 1,845.97