Finding the Fourth Proportional to 2,196.45, 3,295.96 and 810.75

Step by Step Solution

1. Step 1: Write the proportion equation
   2,196.45 : 3,295.96 = 810.75 : x
2. Step 2: Convert to fraction form
   2,196.45/3,295.96 = 810.75/x
3. Step 3: Cross multiply
   2,196.45x = 3,295.96 × 810.75
4. Step 4: Simplify right side
   2,196.45x = 2,672,179.04
5. Step 5: Solve for x
   x = 2,672,179.04/2,196.45
6. Step 6: Final answer
   x = 1,216.59