Finding the Fourth Proportional to 2,196.23, 3,294.36 and 809.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,196.23 : 3,294.36 = 809.88 : x
2. Step 2: Convert to fraction form
   2,196.23/3,294.36 = 809.88/x
3. Step 3: Cross multiply
   2,196.23x = 3,294.36 × 809.88
4. Step 4: Simplify right side
   2,196.23x = 2,668,036.28
5. Step 5: Solve for x
   x = 2,668,036.28/2,196.23
6. Step 6: Final answer
   x = 1,214.83