Finding the Third Proportional to 210,363 and 317,722.50

Step by Step Solution

1. Step 1: Write the proportion equation
   210,363 : 317,722.50 = 317,722.50 : x
2. Step 2: Convert to fraction form
   210,363/317,722.50 = 317,722.50/x
3. Step 3: Cross multiply
   210,363x = 317,722.50 × 317,722.50
4. Step 4: Simplify right side
   210,363x = 100,947,587,006.25
5. Step 5: Solve for x
   x = 100,947,587,006.25/210,363
6. Step 6: Final answer
   x = 479,873.30