Finding the Third Proportional to 159,686 and 250,499

Step by Step Solution

1. Step 1: Write the proportion equation
   159,686 : 250,499 = 250,499 : x
2. Step 2: Convert to fraction form
   159,686/250,499 = 250,499/x
3. Step 3: Cross multiply
   159,686x = 250,499 × 250,499
4. Step 4: Simplify right side
   159,686x = 62,749,749,001
5. Step 5: Solve for x
   x = 62,749,749,001/159,686
6. Step 6: Final answer
   x = 392,957.11