Finding the Third Proportional to 158.20 and 222.75

Step by Step Solution

1. Step 1: Write the proportion equation
   158.20 : 222.75 = 222.75 : x
2. Step 2: Convert to fraction form
   158.20/222.75 = 222.75/x
3. Step 3: Cross multiply
   158.20x = 222.75 × 222.75
4. Step 4: Simplify right side
   158.20x = 49,617.56
5. Step 5: Solve for x
   x = 49,617.56/158.20
6. Step 6: Final answer
   x = 313.63