Finding the Third Proportional to 418,008 and 636,792

Step by Step Solution

1. Step 1: Write the proportion equation
   418,008 : 636,792 = 636,792 : x
2. Step 2: Convert to fraction form
   418,008/636,792 = 636,792/x
3. Step 3: Cross multiply
   418,008x = 636,792 × 636,792
4. Step 4: Simplify right side
   418,008x = 405,504,051,264
5. Step 5: Solve for x
   x = 405,504,051,264/418,008
6. Step 6: Final answer
   x = 970,086.82