Finding the Third Proportional to 42.75 and 89.25

Step by Step Solution

1. Step 1: Write the proportion equation
   42.75 : 89.25 = 89.25 : x
2. Step 2: Convert to fraction form
   42.75/89.25 = 89.25/x
3. Step 3: Cross multiply
   42.75x = 89.25 × 89.25
4. Step 4: Simplify right side
   42.75x = 7,965.56
5. Step 5: Solve for x
   x = 7,965.56/42.75
6. Step 6: Final answer
   x = 186.33