Finding the Fourth Proportional to 2,196.07, 3,294.45 and 809.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,196.07 : 3,294.45 = 809.10 : x
2. Step 2: Convert to fraction form
   2,196.07/3,294.45 = 809.10/x
3. Step 3: Cross multiply
   2,196.07x = 3,294.45 × 809.10
4. Step 4: Simplify right side
   2,196.07x = 2,665,539.50
5. Step 5: Solve for x
   x = 2,665,539.50/2,196.07
6. Step 6: Final answer
   x = 1,213.78