Finding the Third Proportional to 646,670 and 978,957

Step by Step Solution

1. Step 1: Write the proportion equation
   646,670 : 978,957 = 978,957 : x
2. Step 2: Convert to fraction form
   646,670/978,957 = 978,957/x
3. Step 3: Cross multiply
   646,670x = 978,957 × 978,957
4. Step 4: Simplify right side
   646,670x = 958,356,807,849
5. Step 5: Solve for x
   x = 958,356,807,849/646,670
6. Step 6: Final answer
   x = 1,481,987.42