Finding the Third Proportional to 100.88 and 222.38

Step by Step Solution

1. Step 1: Write the proportion equation
   100.88 : 222.38 = 222.38 : x
2. Step 2: Convert to fraction form
   100.88/222.38 = 222.38/x
3. Step 3: Cross multiply
   100.88x = 222.38 × 222.38
4. Step 4: Simplify right side
   100.88x = 49,450.64
5. Step 5: Solve for x
   x = 49,450.64/100.88
6. Step 6: Final answer
   x = 490.22