Finding the Third Proportional to 100.75 and 219.25

Step by Step Solution

1. Step 1: Write the proportion equation
   100.75 : 219.25 = 219.25 : x
2. Step 2: Convert to fraction form
   100.75/219.25 = 219.25/x
3. Step 3: Cross multiply
   100.75x = 219.25 × 219.25
4. Step 4: Simplify right side
   100.75x = 48,070.56
5. Step 5: Solve for x
   x = 48,070.56/100.75
6. Step 6: Final answer
   x = 477.13