Finding the Third Proportional to 646,680 and 978,963

Step by Step Solution

1. Step 1: Write the proportion equation
   646,680 : 978,963 = 978,963 : x
2. Step 2: Convert to fraction form
   646,680/978,963 = 978,963/x
3. Step 3: Cross multiply
   646,680x = 978,963 × 978,963
4. Step 4: Simplify right side
   646,680x = 958,368,555,369
5. Step 5: Solve for x
   x = 958,368,555,369/646,680
6. Step 6: Final answer
   x = 1,481,982.67