Finding the Third Proportional to 646,687 and 978,977

Step by Step Solution

1. Step 1: Write the proportion equation
   646,687 : 978,977 = 978,977 : x
2. Step 2: Convert to fraction form
   646,687/978,977 = 978,977/x
3. Step 3: Cross multiply
   646,687x = 978,977 × 978,977
4. Step 4: Simplify right side
   646,687x = 958,395,966,529
5. Step 5: Solve for x
   x = 958,395,966,529/646,687
6. Step 6: Final answer
   x = 1,482,009.02