Finding the Fourth Proportional to 2,196.81, 3,293.32 and 809.44

Step by Step Solution

1. Step 1: Write the proportion equation
   2,196.81 : 3,293.32 = 809.44 : x
2. Step 2: Convert to fraction form
   2,196.81/3,293.32 = 809.44/x
3. Step 3: Cross multiply
   2,196.81x = 3,293.32 × 809.44
4. Step 4: Simplify right side
   2,196.81x = 2,665,734.68
5. Step 5: Solve for x
   x = 2,665,734.68/2,196.81
6. Step 6: Final answer
   x = 1,213.46