Finding the Third Proportional to 56,909 and 123,907

Step by Step Solution

1. Step 1: Write the proportion equation
   56,909 : 123,907 = 123,907 : x
2. Step 2: Convert to fraction form
   56,909/123,907 = 123,907/x
3. Step 3: Cross multiply
   56,909x = 123,907 × 123,907
4. Step 4: Simplify right side
   56,909x = 15,352,944,649
5. Step 5: Solve for x
   x = 15,352,944,649/56,909
6. Step 6: Final answer
   x = 269,780.61