Finding the Fourth Proportional to 2,647.10, 3,969.37 and 797.87

Step by Step Solution

1. Step 1: Write the proportion equation
   2,647.10 : 3,969.37 = 797.87 : x
2. Step 2: Convert to fraction form
   2,647.10/3,969.37 = 797.87/x
3. Step 3: Cross multiply
   2,647.10x = 3,969.37 × 797.87
4. Step 4: Simplify right side
   2,647.10x = 3,167,039.25
5. Step 5: Solve for x
   x = 3,167,039.25/2,647.10
6. Step 6: Final answer
   x = 1,196.42