Finding the Third Proportional to 383,978 and 792,490

Step by Step Solution

1. Step 1: Write the proportion equation
   383,978 : 792,490 = 792,490 : x
2. Step 2: Convert to fraction form
   383,978/792,490 = 792,490/x
3. Step 3: Cross multiply
   383,978x = 792,490 × 792,490
4. Step 4: Simplify right side
   383,978x = 628,040,400,100
5. Step 5: Solve for x
   x = 628,040,400,100/383,978
6. Step 6: Final answer
   x = 1,635,615.58