Finding the Fourth Proportional to 2,065.83, 3,098.78 and 679.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,065.83 : 3,098.78 = 679.28 : x
2. Step 2: Convert to fraction form
   2,065.83/3,098.78 = 679.28/x
3. Step 3: Cross multiply
   2,065.83x = 3,098.78 × 679.28
4. Step 4: Simplify right side
   2,065.83x = 2,104,920.39
5. Step 5: Solve for x
   x = 2,104,920.39/2,065.83
6. Step 6: Final answer
   x = 1,018.92