Finding the Third Proportional to 142,406 and 303,216

Step by Step Solution

1. Step 1: Write the proportion equation
   142,406 : 303,216 = 303,216 : x
2. Step 2: Convert to fraction form
   142,406/303,216 = 303,216/x
3. Step 3: Cross multiply
   142,406x = 303,216 × 303,216
4. Step 4: Simplify right side
   142,406x = 91,939,942,656
5. Step 5: Solve for x
   x = 91,939,942,656/142,406
6. Step 6: Final answer
   x = 645,618.46