Finding the Fourth Proportional to 2,198.31, 3,294.50 and 810.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,198.31 : 3,294.50 = 810.34 : x
2. Step 2: Convert to fraction form
   2,198.31/3,294.50 = 810.34/x
3. Step 3: Cross multiply
   2,198.31x = 3,294.50 × 810.34
4. Step 4: Simplify right side
   2,198.31x = 2,669,665.20
5. Step 5: Solve for x
   x = 2,669,665.20/2,198.31
6. Step 6: Final answer
   x = 1,214.42