Finding the Third Proportional to 646,677 and 978,968

Step by Step Solution

1. Step 1: Write the proportion equation
   646,677 : 978,968 = 978,968 : x
2. Step 2: Convert to fraction form
   646,677/978,968 = 978,968/x
3. Step 3: Cross multiply
   646,677x = 978,968 × 978,968
4. Step 4: Simplify right side
   646,677x = 958,378,345,024
5. Step 5: Solve for x
   x = 958,378,345,024/646,677
6. Step 6: Final answer
   x = 1,482,004.69