Finding the Third Proportional to 443,920 and 680,784

Step by Step Solution

1. Step 1: Write the proportion equation
   443,920 : 680,784 = 680,784 : x
2. Step 2: Convert to fraction form
   443,920/680,784 = 680,784/x
3. Step 3: Cross multiply
   443,920x = 680,784 × 680,784
4. Step 4: Simplify right side
   443,920x = 463,466,854,656
5. Step 5: Solve for x
   x = 463,466,854,656/443,920
6. Step 6: Final answer
   x = 1,044,032.38