Finding the Third Proportional to 646,691 and 978,983

Step by Step Solution

1. Step 1: Write the proportion equation
   646,691 : 978,983 = 978,983 : x
2. Step 2: Convert to fraction form
   646,691/978,983 = 978,983/x
3. Step 3: Cross multiply
   646,691x = 978,983 × 978,983
4. Step 4: Simplify right side
   646,691x = 958,407,714,289
5. Step 5: Solve for x
   x = 958,407,714,289/646,691
6. Step 6: Final answer
   x = 1,482,018.02