Finding the Fourth Proportional to 2,196.71, 3,295.31 and 809.68

Step by Step Solution

1. Step 1: Write the proportion equation
   2,196.71 : 3,295.31 = 809.68 : x
2. Step 2: Convert to fraction form
   2,196.71/3,295.31 = 809.68/x
3. Step 3: Cross multiply
   2,196.71x = 3,295.31 × 809.68
4. Step 4: Simplify right side
   2,196.71x = 2,668,146.60
5. Step 5: Solve for x
   x = 2,668,146.60/2,196.71
6. Step 6: Final answer
   x = 1,214.61