Finding the Third Proportional to 617.25 and 1,369.31

Step by Step Solution

1. Step 1: Write the proportion equation
   617.25 : 1,369.31 = 1,369.31 : x
2. Step 2: Convert to fraction form
   617.25/1,369.31 = 1,369.31/x
3. Step 3: Cross multiply
   617.25x = 1,369.31 × 1,369.31
4. Step 4: Simplify right side
   617.25x = 1,875,016.72
5. Step 5: Solve for x
   x = 1,875,016.72/617.25
6. Step 6: Final answer
   x = 3,037.69