Finding the Third Proportional to 646,675 and 978,958

Step by Step Solution

1. Step 1: Write the proportion equation
   646,675 : 978,958 = 978,958 : x
2. Step 2: Convert to fraction form
   646,675/978,958 = 978,958/x
3. Step 3: Cross multiply
   646,675x = 978,958 × 978,958
4. Step 4: Simplify right side
   646,675x = 958,358,765,764
5. Step 5: Solve for x
   x = 958,358,765,764/646,675
6. Step 6: Final answer
   x = 1,481,978.99