Finding the Third Proportional to 221,624 and 489,906

Step by Step Solution

1. Step 1: Write the proportion equation
   221,624 : 489,906 = 489,906 : x
2. Step 2: Convert to fraction form
   221,624/489,906 = 489,906/x
3. Step 3: Cross multiply
   221,624x = 489,906 × 489,906
4. Step 4: Simplify right side
   221,624x = 240,007,888,836
5. Step 5: Solve for x
   x = 240,007,888,836/221,624
6. Step 6: Final answer
   x = 1,082,950.80