Finding the Third Proportional to 646,693 and 978,986

Step by Step Solution

1. Step 1: Write the proportion equation
   646,693 : 978,986 = 978,986 : x
2. Step 2: Convert to fraction form
   646,693/978,986 = 978,986/x
3. Step 3: Cross multiply
   646,693x = 978,986 × 978,986
4. Step 4: Simplify right side
   646,693x = 958,413,588,196
5. Step 5: Solve for x
   x = 958,413,588,196/646,693
6. Step 6: Final answer
   x = 1,482,022.52