Finding the Fourth Proportional to 2,196.92, 3,296.82 and 810.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,196.92 : 3,296.82 = 810.28 : x
2. Step 2: Convert to fraction form
   2,196.92/3,296.82 = 810.28/x
3. Step 3: Cross multiply
   2,196.92x = 3,296.82 × 810.28
4. Step 4: Simplify right side
   2,196.92x = 2,671,347.31
5. Step 5: Solve for x
   x = 2,671,347.31/2,196.92
6. Step 6: Final answer
   x = 1,215.95