Finding the Fourth Proportional to 2,196.21, 3,294.64 and 809.39

Step by Step Solution

1. Step 1: Write the proportion equation
   2,196.21 : 3,294.64 = 809.39 : x
2. Step 2: Convert to fraction form
   2,196.21/3,294.64 = 809.39/x
3. Step 3: Cross multiply
   2,196.21x = 3,294.64 × 809.39
4. Step 4: Simplify right side
   2,196.21x = 2,666,657.92
5. Step 5: Solve for x
   x = 2,666,657.92/2,196.21
6. Step 6: Final answer
   x = 1,214.21