Finding the Fourth Proportional to 2,196.97, 3,296.42 and 809.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,196.97 : 3,296.42 = 809.98 : x
2. Step 2: Convert to fraction form
   2,196.97/3,296.42 = 809.98/x
3. Step 3: Cross multiply
   2,196.97x = 3,296.42 × 809.98
4. Step 4: Simplify right side
   2,196.97x = 2,670,034.27
5. Step 5: Solve for x
   x = 2,670,034.27/2,196.97
6. Step 6: Final answer
   x = 1,215.33