Finding the Third Proportional to 978,667 and 2,149,790

Step by Step Solution

1. Step 1: Write the proportion equation
   978,667 : 2,149,790 = 2,149,790 : x
2. Step 2: Convert to fraction form
   978,667/2,149,790 = 2,149,790/x
3. Step 3: Cross multiply
   978,667x = 2,149,790 × 2,149,790
4. Step 4: Simplify right side
   978,667x = 4,621,597,044,100
5. Step 5: Solve for x
   x = 4,621,597,044,100/978,667
6. Step 6: Final answer
   x = 4,722,338.70