Finding the Fourth Proportional to 2,647.83, 3,970.81 and 798.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,647.83 : 3,970.81 = 798.47 : x
2. Step 2: Convert to fraction form
   2,647.83/3,970.81 = 798.47/x
3. Step 3: Cross multiply
   2,647.83x = 3,970.81 × 798.47
4. Step 4: Simplify right side
   2,647.83x = 3,170,572.66
5. Step 5: Solve for x
   x = 3,170,572.66/2,647.83
6. Step 6: Final answer
   x = 1,197.42