Finding the Third Proportional to 313,287.75 and 395,300.25

Step by Step Solution

1. Step 1: Write the proportion equation
   313,287.75 : 395,300.25 = 395,300.25 : x
2. Step 2: Convert to fraction form
   313,287.75/395,300.25 = 395,300.25/x
3. Step 3: Cross multiply
   313,287.75x = 395,300.25 × 395,300.25
4. Step 4: Simplify right side
   313,287.75x = 156,262,287,650.06
5. Step 5: Solve for x
   x = 156,262,287,650.06/313,287.75
6. Step 6: Final answer
   x = 498,781.99