Finding the Third Proportional to 256,252 and 551,870

Step by Step Solution

1. Step 1: Write the proportion equation
   256,252 : 551,870 = 551,870 : x
2. Step 2: Convert to fraction form
   256,252/551,870 = 551,870/x
3. Step 3: Cross multiply
   256,252x = 551,870 × 551,870
4. Step 4: Simplify right side
   256,252x = 304,560,496,900
5. Step 5: Solve for x
   x = 304,560,496,900/256,252
6. Step 6: Final answer
   x = 1,188,519.49