Finding the Fourth Proportional to 2,568.62, 3,853.45 and 836.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,568.62 : 3,853.45 = 836.78 : x
2. Step 2: Convert to fraction form
   2,568.62/3,853.45 = 836.78/x
3. Step 3: Cross multiply
   2,568.62x = 3,853.45 × 836.78
4. Step 4: Simplify right side
   2,568.62x = 3,224,489.89
5. Step 5: Solve for x
   x = 3,224,489.89/2,568.62
6. Step 6: Final answer
   x = 1,255.34