Finding the Third Proportional to 978,662 and 2,149,780

Step by Step Solution

1. Step 1: Write the proportion equation
   978,662 : 2,149,780 = 2,149,780 : x
2. Step 2: Convert to fraction form
   978,662/2,149,780 = 2,149,780/x
3. Step 3: Cross multiply
   978,662x = 2,149,780 × 2,149,780
4. Step 4: Simplify right side
   978,662x = 4,621,554,048,400
5. Step 5: Solve for x
   x = 4,621,554,048,400/978,662
6. Step 6: Final answer
   x = 4,722,318.89