Finding the Third Proportional to 646,507 and 978,759

Step by Step Solution

1. Step 1: Write the proportion equation
   646,507 : 978,759 = 978,759 : x
2. Step 2: Convert to fraction form
   646,507/978,759 = 978,759/x
3. Step 3: Cross multiply
   646,507x = 978,759 × 978,759
4. Step 4: Simplify right side
   646,507x = 957,969,180,081
5. Step 5: Solve for x
   x = 957,969,180,081/646,507
6. Step 6: Final answer
   x = 1,481,761.50