Finding the Fourth Proportional to 2,105.85, 3,158.52 and 719.33

Step by Step Solution

1. Step 1: Write the proportion equation
   2,105.85 : 3,158.52 = 719.33 : x
2. Step 2: Convert to fraction form
   2,105.85/3,158.52 = 719.33/x
3. Step 3: Cross multiply
   2,105.85x = 3,158.52 × 719.33
4. Step 4: Simplify right side
   2,105.85x = 2,272,019.49
5. Step 5: Solve for x
   x = 2,272,019.49/2,105.85
6. Step 6: Final answer
   x = 1,078.91