Finding the Third Proportional to 646,681 and 978,974

Step by Step Solution

1. Step 1: Write the proportion equation
   646,681 : 978,974 = 978,974 : x
2. Step 2: Convert to fraction form
   646,681/978,974 = 978,974/x
3. Step 3: Cross multiply
   646,681x = 978,974 × 978,974
4. Step 4: Simplify right side
   646,681x = 958,390,092,676
5. Step 5: Solve for x
   x = 958,390,092,676/646,681
6. Step 6: Final answer
   x = 1,482,013.69