Finding the Fourth Proportional to 2,456.20, 3,389.74 and 1,394.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,456.20 : 3,389.74 = 1,394.15 : x
2. Step 2: Convert to fraction form
   2,456.20/3,389.74 = 1,394.15/x
3. Step 3: Cross multiply
   2,456.20x = 3,389.74 × 1,394.15
4. Step 4: Simplify right side
   2,456.20x = 4,725,806.02
5. Step 5: Solve for x
   x = 4,725,806.02/2,456.20
6. Step 6: Final answer
   x = 1,924.03