Finding the Third Proportional to 142,423.50 and 303,909

Step by Step Solution

1. Step 1: Write the proportion equation
   142,423.50 : 303,909 = 303,909 : x
2. Step 2: Convert to fraction form
   142,423.50/303,909 = 303,909/x
3. Step 3: Cross multiply
   142,423.50x = 303,909 × 303,909
4. Step 4: Simplify right side
   142,423.50x = 92,360,680,281
5. Step 5: Solve for x
   x = 92,360,680,281/142,423.50
6. Step 6: Final answer
   x = 648,493.26