Finding the Third Proportional to 622,926 and 978,659

Step by Step Solution

1. Step 1: Write the proportion equation
   622,926 : 978,659 = 978,659 : x
2. Step 2: Convert to fraction form
   622,926/978,659 = 978,659/x
3. Step 3: Cross multiply
   622,926x = 978,659 × 978,659
4. Step 4: Simplify right side
   622,926x = 957,773,438,281
5. Step 5: Solve for x
   x = 957,773,438,281/622,926
6. Step 6: Final answer
   x = 1,537,539.67