Finding the Third Proportional to 622,930 and 978,665

Step by Step Solution

1. Step 1: Write the proportion equation
   622,930 : 978,665 = 978,665 : x
2. Step 2: Convert to fraction form
   622,930/978,665 = 978,665/x
3. Step 3: Cross multiply
   622,930x = 978,665 × 978,665
4. Step 4: Simplify right side
   622,930x = 957,785,182,225
5. Step 5: Solve for x
   x = 957,785,182,225/622,930
6. Step 6: Final answer
   x = 1,537,548.65