Finding the Third Proportional to 219.34 and 479.89

Step by Step Solution

1. Step 1: Write the proportion equation
   219.34 : 479.89 = 479.89 : x
2. Step 2: Convert to fraction form
   219.34/479.89 = 479.89/x
3. Step 3: Cross multiply
   219.34x = 479.89 × 479.89
4. Step 4: Simplify right side
   219.34x = 230,298.76
5. Step 5: Solve for x
   x = 230,298.76/219.34
6. Step 6: Final answer
   x = 1,049.96