Finding the Fourth Proportional to 2,196.72, 3,293.10 and 809.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,196.72 : 3,293.10 = 809.10 : x
2. Step 2: Convert to fraction form
   2,196.72/3,293.10 = 809.10/x
3. Step 3: Cross multiply
   2,196.72x = 3,293.10 × 809.10
4. Step 4: Simplify right side
   2,196.72x = 2,664,447.21
5. Step 5: Solve for x
   x = 2,664,447.21/2,196.72
6. Step 6: Final answer
   x = 1,212.92