Finding the Fourth Proportional to 2,456.73, 3,390.15 and 1,408.79

Step by Step Solution

1. Step 1: Write the proportion equation
   2,456.73 : 3,390.15 = 1,408.79 : x
2. Step 2: Convert to fraction form
   2,456.73/3,390.15 = 1,408.79/x
3. Step 3: Cross multiply
   2,456.73x = 3,390.15 × 1,408.79
4. Step 4: Simplify right side
   2,456.73x = 4,776,023.18
5. Step 5: Solve for x
   x = 4,776,023.18/2,456.73
6. Step 6: Final answer
   x = 1,944.06