Finding the Third Proportional to 123,512 and 251,398

Step by Step Solution

1. Step 1: Write the proportion equation
   123,512 : 251,398 = 251,398 : x
2. Step 2: Convert to fraction form
   123,512/251,398 = 251,398/x
3. Step 3: Cross multiply
   123,512x = 251,398 × 251,398
4. Step 4: Simplify right side
   123,512x = 63,200,954,404
5. Step 5: Solve for x
   x = 63,200,954,404/123,512
6. Step 6: Final answer
   x = 511,698.90