Finding the Third Proportional to 221,780 and 479,976

Step by Step Solution

1. Step 1: Write the proportion equation
   221,780 : 479,976 = 479,976 : x
2. Step 2: Convert to fraction form
   221,780/479,976 = 479,976/x
3. Step 3: Cross multiply
   221,780x = 479,976 × 479,976
4. Step 4: Simplify right side
   221,780x = 230,376,960,576
5. Step 5: Solve for x
   x = 230,376,960,576/221,780
6. Step 6: Final answer
   x = 1,038,763.46