Finding the Third Proportional to 396,384 and 871,488

Step by Step Solution

1. Step 1: Write the proportion equation
   396,384 : 871,488 = 871,488 : x
2. Step 2: Convert to fraction form
   396,384/871,488 = 871,488/x
3. Step 3: Cross multiply
   396,384x = 871,488 × 871,488
4. Step 4: Simplify right side
   396,384x = 759,491,334,144
5. Step 5: Solve for x
   x = 759,491,334,144/396,384
6. Step 6: Final answer
   x = 1,916,049.42