Finding the Third Proportional to 422,778 and 654,351.50

Step by Step Solution

1. Step 1: Write the proportion equation
   422,778 : 654,351.50 = 654,351.50 : x
2. Step 2: Convert to fraction form
   422,778/654,351.50 = 654,351.50/x
3. Step 3: Cross multiply
   422,778x = 654,351.50 × 654,351.50
4. Step 4: Simplify right side
   422,778x = 428,175,885,552.25
5. Step 5: Solve for x
   x = 428,175,885,552.25/422,778
6. Step 6: Final answer
   x = 1,012,767.66