Finding the Fourth Proportional to 2,411.64, 3,618.06 and 680.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,411.64 : 3,618.06 = 680.28 : x
2. Step 2: Convert to fraction form
   2,411.64/3,618.06 = 680.28/x
3. Step 3: Cross multiply
   2,411.64x = 3,618.06 × 680.28
4. Step 4: Simplify right side
   2,411.64x = 2,461,293.86
5. Step 5: Solve for x
   x = 2,461,293.86/2,411.64
6. Step 6: Final answer
   x = 1,020.59