Finding the Fourth Proportional to 2,647.85, 3,970.49 and 798.62

Step by Step Solution

1. Step 1: Write the proportion equation
   2,647.85 : 3,970.49 = 798.62 : x
2. Step 2: Convert to fraction form
   2,647.85/3,970.49 = 798.62/x
3. Step 3: Cross multiply
   2,647.85x = 3,970.49 × 798.62
4. Step 4: Simplify right side
   2,647.85x = 3,170,912.72
5. Step 5: Solve for x
   x = 3,170,912.72/2,647.85
6. Step 6: Final answer
   x = 1,197.54