Finding the Third Proportional to 862.13 and 1,369.31

Step by Step Solution

1. Step 1: Write the proportion equation
   862.13 : 1,369.31 = 1,369.31 : x
2. Step 2: Convert to fraction form
   862.13/1,369.31 = 1,369.31/x
3. Step 3: Cross multiply
   862.13x = 1,369.31 × 1,369.31
4. Step 4: Simplify right side
   862.13x = 1,875,016.72
5. Step 5: Solve for x
   x = 1,875,016.72/862.13
6. Step 6: Final answer
   x = 2,174.88