Finding the Third Proportional to 210,300.50 and 317,960.50

Step by Step Solution

1. Step 1: Write the proportion equation
   210,300.50 : 317,960.50 = 317,960.50 : x
2. Step 2: Convert to fraction form
   210,300.50/317,960.50 = 317,960.50/x
3. Step 3: Cross multiply
   210,300.50x = 317,960.50 × 317,960.50
4. Step 4: Simplify right side
   210,300.50x = 101,098,879,560.25
5. Step 5: Solve for x
   x = 101,098,879,560.25/210,300.50
6. Step 6: Final answer
   x = 480,735.33