Finding the Fourth Proportional to 2,411.92, 3,618.09 and 680.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,411.92 : 3,618.09 = 680.56 : x
2. Step 2: Convert to fraction form
   2,411.92/3,618.09 = 680.56/x
3. Step 3: Cross multiply
   2,411.92x = 3,618.09 × 680.56
4. Step 4: Simplify right side
   2,411.92x = 2,462,327.33
5. Step 5: Solve for x
   x = 2,462,327.33/2,411.92
6. Step 6: Final answer
   x = 1,020.90