Finding the Third Proportional to 123,220 and 250,907

Step by Step Solution

1. Step 1: Write the proportion equation
   123,220 : 250,907 = 250,907 : x
2. Step 2: Convert to fraction form
   123,220/250,907 = 250,907/x
3. Step 3: Cross multiply
   123,220x = 250,907 × 250,907
4. Step 4: Simplify right side
   123,220x = 62,954,322,649
5. Step 5: Solve for x
   x = 62,954,322,649/123,220
6. Step 6: Final answer
   x = 510,909.94