Finding the Third Proportional to 85.25 and 186.25

Step by Step Solution

1. Step 1: Write the proportion equation
   85.25 : 186.25 = 186.25 : x
2. Step 2: Convert to fraction form
   85.25/186.25 = 186.25/x
3. Step 3: Cross multiply
   85.25x = 186.25 × 186.25
4. Step 4: Simplify right side
   85.25x = 34,689.06
5. Step 5: Solve for x
   x = 34,689.06/85.25
6. Step 6: Final answer
   x = 406.91