Finding the Third Proportional to 123,039 and 251,667

Step by Step Solution

1. Step 1: Write the proportion equation
   123,039 : 251,667 = 251,667 : x
2. Step 2: Convert to fraction form
   123,039/251,667 = 251,667/x
3. Step 3: Cross multiply
   123,039x = 251,667 × 251,667
4. Step 4: Simplify right side
   123,039x = 63,336,278,889
5. Step 5: Solve for x
   x = 63,336,278,889/123,039
6. Step 6: Final answer
   x = 514,765.88