Finding the Third Proportional to 222,770 and 489,646

Step by Step Solution

1. Step 1: Write the proportion equation
   222,770 : 489,646 = 489,646 : x
2. Step 2: Convert to fraction form
   222,770/489,646 = 489,646/x
3. Step 3: Cross multiply
   222,770x = 489,646 × 489,646
4. Step 4: Simplify right side
   222,770x = 239,753,205,316
5. Step 5: Solve for x
   x = 239,753,205,316/222,770
6. Step 6: Final answer
   x = 1,076,236.50