Finding the Third Proportional to 219,520 and 479,216

Step by Step Solution

1. Step 1: Write the proportion equation
   219,520 : 479,216 = 479,216 : x
2. Step 2: Convert to fraction form
   219,520/479,216 = 479,216/x
3. Step 3: Cross multiply
   219,520x = 479,216 × 479,216
4. Step 4: Simplify right side
   219,520x = 229,647,974,656
5. Step 5: Solve for x
   x = 229,647,974,656/219,520
6. Step 6: Final answer
   x = 1,046,136.91