Finding the Fourth Proportional to 2,456.28, 3,389.64 and 1,408.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,456.28 : 3,389.64 = 1,408.50 : x
2. Step 2: Convert to fraction form
   2,456.28/3,389.64 = 1,408.50/x
3. Step 3: Cross multiply
   2,456.28x = 3,389.64 × 1,408.50
4. Step 4: Simplify right side
   2,456.28x = 4,774,307.94
5. Step 5: Solve for x
   x = 4,774,307.94/2,456.28
6. Step 6: Final answer
   x = 1,943.71