Finding the Third Proportional to 978,668 and 2,149,792

Step by Step Solution

1. Step 1: Write the proportion equation
   978,668 : 2,149,792 = 2,149,792 : x
2. Step 2: Convert to fraction form
   978,668/2,149,792 = 2,149,792/x
3. Step 3: Cross multiply
   978,668x = 2,149,792 × 2,149,792
4. Step 4: Simplify right side
   978,668x = 4,621,605,643,264
5. Step 5: Solve for x
   x = 4,621,605,643,264/978,668
6. Step 6: Final answer
   x = 4,722,342.66