Finding the Third Proportional to 123,220 and 250,906

Step by Step Solution

1. Step 1: Write the proportion equation
   123,220 : 250,906 = 250,906 : x
2. Step 2: Convert to fraction form
   123,220/250,906 = 250,906/x
3. Step 3: Cross multiply
   123,220x = 250,906 × 250,906
4. Step 4: Simplify right side
   123,220x = 62,953,820,836
5. Step 5: Solve for x
   x = 62,953,820,836/123,220
6. Step 6: Final answer
   x = 510,905.87