Finding the Third Proportional to 443,910 and 978,308

Step by Step Solution

1. Step 1: Write the proportion equation
   443,910 : 978,308 = 978,308 : x
2. Step 2: Convert to fraction form
   443,910/978,308 = 978,308/x
3. Step 3: Cross multiply
   443,910x = 978,308 × 978,308
4. Step 4: Simplify right side
   443,910x = 957,086,542,864
5. Step 5: Solve for x
   x = 957,086,542,864/443,910
6. Step 6: Final answer
   x = 2,156,037.36