Finding the Third Proportional to 100.69 and 219.94

Step by Step Solution

1. Step 1: Write the proportion equation
   100.69 : 219.94 = 219.94 : x
2. Step 2: Convert to fraction form
   100.69/219.94 = 219.94/x
3. Step 3: Cross multiply
   100.69x = 219.94 × 219.94
4. Step 4: Simplify right side
   100.69x = 48,372.50
5. Step 5: Solve for x
   x = 48,372.50/100.69
6. Step 6: Final answer
   x = 480.42