Finding the Third Proportional to 443,939 and 978,365

Step by Step Solution

1. Step 1: Write the proportion equation
   443,939 : 978,365 = 978,365 : x
2. Step 2: Convert to fraction form
   443,939/978,365 = 978,365/x
3. Step 3: Cross multiply
   443,939x = 978,365 × 978,365
4. Step 4: Simplify right side
   443,939x = 957,198,073,225
5. Step 5: Solve for x
   x = 957,198,073,225/443,939
6. Step 6: Final answer
   x = 2,156,147.74