Finding the Third Proportional to 646,662 and 978,940

Step by Step Solution

1. Step 1: Write the proportion equation
   646,662 : 978,940 = 978,940 : x
2. Step 2: Convert to fraction form
   646,662/978,940 = 978,940/x
3. Step 3: Cross multiply
   646,662x = 978,940 × 978,940
4. Step 4: Simplify right side
   646,662x = 958,323,523,600
5. Step 5: Solve for x
   x = 958,323,523,600/646,662
6. Step 6: Final answer
   x = 1,481,954.29