Finding the Fourth Proportional to 2,647.29, 3,968.77 and 1,329.45

Step by Step Solution

1. Step 1: Write the proportion equation
   2,647.29 : 3,968.77 = 1,329.45 : x
2. Step 2: Convert to fraction form
   2,647.29/3,968.77 = 1,329.45/x
3. Step 3: Cross multiply
   2,647.29x = 3,968.77 × 1,329.45
4. Step 4: Simplify right side
   2,647.29x = 5,276,281.28
5. Step 5: Solve for x
   x = 5,276,281.28/2,647.29
6. Step 6: Final answer
   x = 1,993.09