Finding the Third Proportional to 646,683 and 978,970

Step by Step Solution

1. Step 1: Write the proportion equation
   646,683 : 978,970 = 978,970 : x
2. Step 2: Convert to fraction form
   646,683/978,970 = 978,970/x
3. Step 3: Cross multiply
   646,683x = 978,970 × 978,970
4. Step 4: Simplify right side
   646,683x = 958,382,260,900
5. Step 5: Solve for x
   x = 958,382,260,900/646,683
6. Step 6: Final answer
   x = 1,481,996.99