Finding the Third Proportional to 123,211 and 250,886

Step by Step Solution

1. Step 1: Write the proportion equation
   123,211 : 250,886 = 250,886 : x
2. Step 2: Convert to fraction form
   123,211/250,886 = 250,886/x
3. Step 3: Cross multiply
   123,211x = 250,886 × 250,886
4. Step 4: Simplify right side
   123,211x = 62,943,784,996
5. Step 5: Solve for x
   x = 62,943,784,996/123,211
6. Step 6: Final answer
   x = 510,861.73