Finding the Third Proportional to 142,240.50 and 303,921

Step by Step Solution

1. Step 1: Write the proportion equation
   142,240.50 : 303,921 = 303,921 : x
2. Step 2: Convert to fraction form
   142,240.50/303,921 = 303,921/x
3. Step 3: Cross multiply
   142,240.50x = 303,921 × 303,921
4. Step 4: Simplify right side
   142,240.50x = 92,367,974,241
5. Step 5: Solve for x
   x = 92,367,974,241/142,240.50
6. Step 6: Final answer
   x = 649,378.86