Finding the Fourth Proportional to 2,410.79, 3,616.31 and 679.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,410.79 : 3,616.31 = 679.55 : x
2. Step 2: Convert to fraction form
   2,410.79/3,616.31 = 679.55/x
3. Step 3: Cross multiply
   2,410.79x = 3,616.31 × 679.55
4. Step 4: Simplify right side
   2,410.79x = 2,457,463.46
5. Step 5: Solve for x
   x = 2,457,463.46/2,410.79
6. Step 6: Final answer
   x = 1,019.36