Finding the Third Proportional to 443,911 and 978,305

Step by Step Solution

1. Step 1: Write the proportion equation
   443,911 : 978,305 = 978,305 : x
2. Step 2: Convert to fraction form
   443,911/978,305 = 978,305/x
3. Step 3: Cross multiply
   443,911x = 978,305 × 978,305
4. Step 4: Simplify right side
   443,911x = 957,080,673,025
5. Step 5: Solve for x
   x = 957,080,673,025/443,911
6. Step 6: Final answer
   x = 2,156,019.28