Finding the Fourth Proportional to 2,641.92, 3,962.72 and 694.24

Step by Step Solution

1. Step 1: Write the proportion equation
   2,641.92 : 3,962.72 = 694.24 : x
2. Step 2: Convert to fraction form
   2,641.92/3,962.72 = 694.24/x
3. Step 3: Cross multiply
   2,641.92x = 3,962.72 × 694.24
4. Step 4: Simplify right side
   2,641.92x = 2,751,078.73
5. Step 5: Solve for x
   x = 2,751,078.73/2,641.92
6. Step 6: Final answer
   x = 1,041.32