Finding the Third Proportional to 301,914 and 639,792

Step by Step Solution

1. Step 1: Write the proportion equation
   301,914 : 639,792 = 639,792 : x
2. Step 2: Convert to fraction form
   301,914/639,792 = 639,792/x
3. Step 3: Cross multiply
   301,914x = 639,792 × 639,792
4. Step 4: Simplify right side
   301,914x = 409,333,803,264
5. Step 5: Solve for x
   x = 409,333,803,264/301,914
6. Step 6: Final answer
   x = 1,355,796.03