Finding the Third Proportional to 221,352 and 489,222

Step by Step Solution

1. Step 1: Write the proportion equation
   221,352 : 489,222 = 489,222 : x
2. Step 2: Convert to fraction form
   221,352/489,222 = 489,222/x
3. Step 3: Cross multiply
   221,352x = 489,222 × 489,222
4. Step 4: Simplify right side
   221,352x = 239,338,165,284
5. Step 5: Solve for x
   x = 239,338,165,284/221,352
6. Step 6: Final answer
   x = 1,081,255.94