Finding the Third Proportional to 210,239 and 317,871.50

Step by Step Solution

1. Step 1: Write the proportion equation
   210,239 : 317,871.50 = 317,871.50 : x
2. Step 2: Convert to fraction form
   210,239/317,871.50 = 317,871.50/x
3. Step 3: Cross multiply
   210,239x = 317,871.50 × 317,871.50
4. Step 4: Simplify right side
   210,239x = 101,042,290,512.25
5. Step 5: Solve for x
   x = 101,042,290,512.25/210,239
6. Step 6: Final answer
   x = 480,606.79