Finding the Third Proportional to 646,672 and 978,955

Step by Step Solution

1. Step 1: Write the proportion equation
   646,672 : 978,955 = 978,955 : x
2. Step 2: Convert to fraction form
   646,672/978,955 = 978,955/x
3. Step 3: Cross multiply
   646,672x = 978,955 × 978,955
4. Step 4: Simplify right side
   646,672x = 958,352,892,025
5. Step 5: Solve for x
   x = 958,352,892,025/646,672
6. Step 6: Final answer
   x = 1,481,976.79