Finding the Third Proportional to 622,921 and 978,651

Step by Step Solution

1. Step 1: Write the proportion equation
   622,921 : 978,651 = 978,651 : x
2. Step 2: Convert to fraction form
   622,921/978,651 = 978,651/x
3. Step 3: Cross multiply
   622,921x = 978,651 × 978,651
4. Step 4: Simplify right side
   622,921x = 957,757,779,801
5. Step 5: Solve for x
   x = 957,757,779,801/622,921
6. Step 6: Final answer
   x = 1,537,526.88