Finding the Fourth Proportional to 2,196.82, 3,294.16 and 810.81

Step by Step Solution

1. Step 1: Write the proportion equation
   2,196.82 : 3,294.16 = 810.81 : x
2. Step 2: Convert to fraction form
   2,196.82/3,294.16 = 810.81/x
3. Step 3: Cross multiply
   2,196.82x = 3,294.16 × 810.81
4. Step 4: Simplify right side
   2,196.82x = 2,670,928.05
5. Step 5: Solve for x
   x = 2,670,928.05/2,196.82
6. Step 6: Final answer
   x = 1,215.82