Finding the Fourth Proportional to 2,196.27, 3,295.69 and 810.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,196.27 : 3,295.69 = 810.57 : x
2. Step 2: Convert to fraction form
   2,196.27/3,295.69 = 810.57/x
3. Step 3: Cross multiply
   2,196.27x = 3,295.69 × 810.57
4. Step 4: Simplify right side
   2,196.27x = 2,671,381.23
5. Step 5: Solve for x
   x = 2,671,381.23/2,196.27
6. Step 6: Final answer
   x = 1,216.33