Finding the Fourth Proportional to 2,196.79, 3,295.47 and 809.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,196.79 : 3,295.47 = 809.86 : x
2. Step 2: Convert to fraction form
   2,196.79/3,295.47 = 809.86/x
3. Step 3: Cross multiply
   2,196.79x = 3,295.47 × 809.86
4. Step 4: Simplify right side
   2,196.79x = 2,668,869.33
5. Step 5: Solve for x
   x = 2,668,869.33/2,196.79
6. Step 6: Final answer
   x = 1,214.90