Finding the Third Proportional to 200,612 and 311,630.50

Step by Step Solution

1. Step 1: Write the proportion equation
   200,612 : 311,630.50 = 311,630.50 : x
2. Step 2: Convert to fraction form
   200,612/311,630.50 = 311,630.50/x
3. Step 3: Cross multiply
   200,612x = 311,630.50 × 311,630.50
4. Step 4: Simplify right side
   200,612x = 97,113,568,530.25
5. Step 5: Solve for x
   x = 97,113,568,530.25/200,612
6. Step 6: Final answer
   x = 484,086.54