Finding the Fourth Proportional to 2,562.79, 3,844.77 and 807.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,562.79 : 3,844.77 = 807.78 : x
2. Step 2: Convert to fraction form
   2,562.79/3,844.77 = 807.78/x
3. Step 3: Cross multiply
   2,562.79x = 3,844.77 × 807.78
4. Step 4: Simplify right side
   2,562.79x = 3,105,735.90
5. Step 5: Solve for x
   x = 3,105,735.90/2,562.79
6. Step 6: Final answer
   x = 1,211.86