Finding the Third Proportional to 90.75 and 168.25

Step by Step Solution

1. Step 1: Write the proportion equation
   90.75 : 168.25 = 168.25 : x
2. Step 2: Convert to fraction form
   90.75/168.25 = 168.25/x
3. Step 3: Cross multiply
   90.75x = 168.25 × 168.25
4. Step 4: Simplify right side
   90.75x = 28,308.06
5. Step 5: Solve for x
   x = 28,308.06/90.75
6. Step 6: Final answer
   x = 311.93