Finding the Fourth Proportional to 2,065.95, 3,099.39 and 679.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,065.95 : 3,099.39 = 679.30 : x
2. Step 2: Convert to fraction form
   2,065.95/3,099.39 = 679.30/x
3. Step 3: Cross multiply
   2,065.95x = 3,099.39 × 679.30
4. Step 4: Simplify right side
   2,065.95x = 2,105,414.82
5. Step 5: Solve for x
   x = 2,105,414.82/2,065.95
6. Step 6: Final answer
   x = 1,019.10