Finding the Third Proportional to 142,800.75 and 303,939

Step by Step Solution

1. Step 1: Write the proportion equation
   142,800.75 : 303,939 = 303,939 : x
2. Step 2: Convert to fraction form
   142,800.75/303,939 = 303,939/x
3. Step 3: Cross multiply
   142,800.75x = 303,939 × 303,939
4. Step 4: Simplify right side
   142,800.75x = 92,378,915,721
5. Step 5: Solve for x
   x = 92,378,915,721/142,800.75
6. Step 6: Final answer
   x = 646,907.78