Finding the Third Proportional to 646,666 and 978,946

Step by Step Solution

1. Step 1: Write the proportion equation
   646,666 : 978,946 = 978,946 : x
2. Step 2: Convert to fraction form
   646,666/978,946 = 978,946/x
3. Step 3: Cross multiply
   646,666x = 978,946 × 978,946
4. Step 4: Simplify right side
   646,666x = 958,335,270,916
5. Step 5: Solve for x
   x = 958,335,270,916/646,666
6. Step 6: Final answer
   x = 1,481,963.29