Finding the Fourth Proportional to 2,196.09, 3,295.43 and 810.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,196.09 : 3,295.43 = 810.40 : x
2. Step 2: Convert to fraction form
   2,196.09/3,295.43 = 810.40/x
3. Step 3: Cross multiply
   2,196.09x = 3,295.43 × 810.40
4. Step 4: Simplify right side
   2,196.09x = 2,670,610.26
5. Step 5: Solve for x
   x = 2,670,610.26/2,196.09
6. Step 6: Final answer
   x = 1,216.08