Finding the Third Proportional to 188,406 and 404,109

Step by Step Solution

1. Step 1: Write the proportion equation
   188,406 : 404,109 = 404,109 : x
2. Step 2: Convert to fraction form
   188,406/404,109 = 404,109/x
3. Step 3: Cross multiply
   188,406x = 404,109 × 404,109
4. Step 4: Simplify right side
   188,406x = 163,304,083,881
5. Step 5: Solve for x
   x = 163,304,083,881/188,406
6. Step 6: Final answer
   x = 866,766.90