Finding the Third Proportional to 250,338 and 521,388

Step by Step Solution

1. Step 1: Write the proportion equation
   250,338 : 521,388 = 521,388 : x
2. Step 2: Convert to fraction form
   250,338/521,388 = 521,388/x
3. Step 3: Cross multiply
   250,338x = 521,388 × 521,388
4. Step 4: Simplify right side
   250,338x = 271,845,446,544
5. Step 5: Solve for x
   x = 271,845,446,544/250,338
6. Step 6: Final answer
   x = 1,085,913.63