Finding the Third Proportional to 290,450.50 and 636,797

Step by Step Solution

1. Step 1: Write the proportion equation
   290,450.50 : 636,797 = 636,797 : x
2. Step 2: Convert to fraction form
   290,450.50/636,797 = 636,797/x
3. Step 3: Cross multiply
   290,450.50x = 636,797 × 636,797
4. Step 4: Simplify right side
   290,450.50x = 405,510,419,209
5. Step 5: Solve for x
   x = 405,510,419,209/290,450.50
6. Step 6: Final answer
   x = 1,396,142.95