Finding the Third Proportional to 443,918 and 978,320

Step by Step Solution

1. Step 1: Write the proportion equation
   443,918 : 978,320 = 978,320 : x
2. Step 2: Convert to fraction form
   443,918/978,320 = 978,320/x
3. Step 3: Cross multiply
   443,918x = 978,320 × 978,320
4. Step 4: Simplify right side
   443,918x = 957,110,022,400
5. Step 5: Solve for x
   x = 957,110,022,400/443,918
6. Step 6: Final answer
   x = 2,156,051.39