Finding the Third Proportional to 646,666 and 978,942

Step by Step Solution

1. Step 1: Write the proportion equation
   646,666 : 978,942 = 978,942 : x
2. Step 2: Convert to fraction form
   646,666/978,942 = 978,942/x
3. Step 3: Cross multiply
   646,666x = 978,942 × 978,942
4. Step 4: Simplify right side
   646,666x = 958,327,439,364
5. Step 5: Solve for x
   x = 958,327,439,364/646,666
6. Step 6: Final answer
   x = 1,481,951.18