Finding the Third Proportional to 422,664 and 627,012

Step by Step Solution

1. Step 1: Write the proportion equation
   422,664 : 627,012 = 627,012 : x
2. Step 2: Convert to fraction form
   422,664/627,012 = 627,012/x
3. Step 3: Cross multiply
   422,664x = 627,012 × 627,012
4. Step 4: Simplify right side
   422,664x = 393,144,048,144
5. Step 5: Solve for x
   x = 393,144,048,144/422,664
6. Step 6: Final answer
   x = 930,157.40