Finding the Third Proportional to 123,252 and 258,939

Step by Step Solution

1. Step 1: Write the proportion equation
   123,252 : 258,939 = 258,939 : x
2. Step 2: Convert to fraction form
   123,252/258,939 = 258,939/x
3. Step 3: Cross multiply
   123,252x = 258,939 × 258,939
4. Step 4: Simplify right side
   123,252x = 67,049,405,721
5. Step 5: Solve for x
   x = 67,049,405,721/123,252
6. Step 6: Final answer
   x = 544,002.58