Finding the Fourth Proportional to 2,648.66, 3,971.71 and 799.43

Step by Step Solution

1. Step 1: Write the proportion equation
   2,648.66 : 3,971.71 = 799.43 : x
2. Step 2: Convert to fraction form
   2,648.66/3,971.71 = 799.43/x
3. Step 3: Cross multiply
   2,648.66x = 3,971.71 × 799.43
4. Step 4: Simplify right side
   2,648.66x = 3,175,104.13
5. Step 5: Solve for x
   x = 3,175,104.13/2,648.66
6. Step 6: Final answer
   x = 1,198.76