Finding the Fourth Proportional to 2,694.78, 4,042.22 and 845.85

Step by Step Solution

1. Step 1: Write the proportion equation
   2,694.78 : 4,042.22 = 845.85 : x
2. Step 2: Convert to fraction form
   2,694.78/4,042.22 = 845.85/x
3. Step 3: Cross multiply
   2,694.78x = 4,042.22 × 845.85
4. Step 4: Simplify right side
   2,694.78x = 3,419,111.79
5. Step 5: Solve for x
   x = 3,419,111.79/2,694.78
6. Step 6: Final answer
   x = 1,268.79