Finding the Fourth Proportional to 2,196.47, 3,296.00 and 810.77

Step by Step Solution

1. Step 1: Write the proportion equation
   2,196.47 : 3,296.00 = 810.77 : x
2. Step 2: Convert to fraction form
   2,196.47/3,296.00 = 810.77/x
3. Step 3: Cross multiply
   2,196.47x = 3,296.00 × 810.77
4. Step 4: Simplify right side
   2,196.47x = 2,672,308.19
5. Step 5: Solve for x
   x = 2,672,308.19/2,196.47
6. Step 6: Final answer
   x = 1,216.64