Finding the Third Proportional to 224,640 and 489,456

Step by Step Solution

1. Step 1: Write the proportion equation
   224,640 : 489,456 = 489,456 : x
2. Step 2: Convert to fraction form
   224,640/489,456 = 489,456/x
3. Step 3: Cross multiply
   224,640x = 489,456 × 489,456
4. Step 4: Simplify right side
   224,640x = 239,567,175,936
5. Step 5: Solve for x
   x = 239,567,175,936/224,640
6. Step 6: Final answer
   x = 1,066,449.32