Finding the Third Proportional to 804 and 1,142.25

Step by Step Solution

1. Step 1: Write the proportion equation
   804 : 1,142.25 = 1,142.25 : x
2. Step 2: Convert to fraction form
   804/1,142.25 = 1,142.25/x
3. Step 3: Cross multiply
   804x = 1,142.25 × 1,142.25
4. Step 4: Simplify right side
   804x = 1,304,735.06
5. Step 5: Solve for x
   x = 1,304,735.06/804
6. Step 6: Final answer
   x = 1,622.80