Finding the Fourth Proportional to 2,456.20, 3,390.29 and 1,617.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,456.20 : 3,390.29 = 1,617.55 : x
2. Step 2: Convert to fraction form
   2,456.20/3,390.29 = 1,617.55/x
3. Step 3: Cross multiply
   2,456.20x = 3,390.29 × 1,617.55
4. Step 4: Simplify right side
   2,456.20x = 5,483,963.59
5. Step 5: Solve for x
   x = 5,483,963.59/2,456.20
6. Step 6: Final answer
   x = 2,232.70