Finding the Fourth Proportional to 2,568.61, 3,853.04 and 719.85

Step by Step Solution

1. Step 1: Write the proportion equation
   2,568.61 : 3,853.04 = 719.85 : x
2. Step 2: Convert to fraction form
   2,568.61/3,853.04 = 719.85/x
3. Step 3: Cross multiply
   2,568.61x = 3,853.04 × 719.85
4. Step 4: Simplify right side
   2,568.61x = 2,773,621.69
5. Step 5: Solve for x
   x = 2,773,621.69/2,568.61
6. Step 6: Final answer
   x = 1,079.81