Finding the Third Proportional to 85.50 and 110.25

Step by Step Solution

1. Step 1: Write the proportion equation
   85.50 : 110.25 = 110.25 : x
2. Step 2: Convert to fraction form
   85.50/110.25 = 110.25/x
3. Step 3: Cross multiply
   85.50x = 110.25 × 110.25
4. Step 4: Simplify right side
   85.50x = 12,155.06
5. Step 5: Solve for x
   x = 12,155.06/85.50
6. Step 6: Final answer
   x = 142.16