Finding the Third Proportional to 142,417 and 303,242

Step by Step Solution

1. Step 1: Write the proportion equation
   142,417 : 303,242 = 303,242 : x
2. Step 2: Convert to fraction form
   142,417/303,242 = 303,242/x
3. Step 3: Cross multiply
   142,417x = 303,242 × 303,242
4. Step 4: Simplify right side
   142,417x = 91,955,710,564
5. Step 5: Solve for x
   x = 91,955,710,564/142,417
6. Step 6: Final answer
   x = 645,679.31