Finding the Fourth Proportional to 2,196.07, 3,294.93 and 810.33

Step by Step Solution

1. Step 1: Write the proportion equation
   2,196.07 : 3,294.93 = 810.33 : x
2. Step 2: Convert to fraction form
   2,196.07/3,294.93 = 810.33/x
3. Step 3: Cross multiply
   2,196.07x = 3,294.93 × 810.33
4. Step 4: Simplify right side
   2,196.07x = 2,669,980.63
5. Step 5: Solve for x
   x = 2,669,980.63/2,196.07
6. Step 6: Final answer
   x = 1,215.80