Finding the Third Proportional to 646,505 and 978,756

Step by Step Solution

1. Step 1: Write the proportion equation
   646,505 : 978,756 = 978,756 : x
2. Step 2: Convert to fraction form
   646,505/978,756 = 978,756/x
3. Step 3: Cross multiply
   646,505x = 978,756 × 978,756
4. Step 4: Simplify right side
   646,505x = 957,963,307,536
5. Step 5: Solve for x
   x = 957,963,307,536/646,505
6. Step 6: Final answer
   x = 1,481,757.00