Finding the Third Proportional to 100.63 and 219.56

Step by Step Solution

1. Step 1: Write the proportion equation
   100.63 : 219.56 = 219.56 : x
2. Step 2: Convert to fraction form
   100.63/219.56 = 219.56/x
3. Step 3: Cross multiply
   100.63x = 219.56 × 219.56
4. Step 4: Simplify right side
   100.63x = 48,207.69
5. Step 5: Solve for x
   x = 48,207.69/100.63
6. Step 6: Final answer
   x = 479.08