Finding the Third Proportional to 123,507 and 251,379

Step by Step Solution

1. Step 1: Write the proportion equation
   123,507 : 251,379 = 251,379 : x
2. Step 2: Convert to fraction form
   123,507/251,379 = 251,379/x
3. Step 3: Cross multiply
   123,507x = 251,379 × 251,379
4. Step 4: Simplify right side
   123,507x = 63,191,401,641
5. Step 5: Solve for x
   x = 63,191,401,641/123,507
6. Step 6: Final answer
   x = 511,642.27