Finding the Fourth Proportional to 2,065.60, 3,098.94 and 679.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,065.60 : 3,098.94 = 679.15 : x
2. Step 2: Convert to fraction form
   2,065.60/3,098.94 = 679.15/x
3. Step 3: Cross multiply
   2,065.60x = 3,098.94 × 679.15
4. Step 4: Simplify right side
   2,065.60x = 2,104,645.10
5. Step 5: Solve for x
   x = 2,104,645.10/2,065.60
6. Step 6: Final answer
   x = 1,018.90