Finding the Fourth Proportional to 2,646.97, 3,968.83 and 1,329.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,646.97 : 3,968.83 = 1,329.15 : x
2. Step 2: Convert to fraction form
   2,646.97/3,968.83 = 1,329.15/x
3. Step 3: Cross multiply
   2,646.97x = 3,968.83 × 1,329.15
4. Step 4: Simplify right side
   2,646.97x = 5,275,170.39
5. Step 5: Solve for x
   x = 5,275,170.39/2,646.97
6. Step 6: Final answer
   x = 1,992.91