Finding the Third Proportional to 67,216.50 and 144,909

Step by Step Solution

1. Step 1: Write the proportion equation
   67,216.50 : 144,909 = 144,909 : x
2. Step 2: Convert to fraction form
   67,216.50/144,909 = 144,909/x
3. Step 3: Cross multiply
   67,216.50x = 144,909 × 144,909
4. Step 4: Simplify right side
   67,216.50x = 20,998,618,281
5. Step 5: Solve for x
   x = 20,998,618,281/67,216.50
6. Step 6: Final answer
   x = 312,402.73