Finding the Third Proportional to 142,016 and 309,088

Step by Step Solution

1. Step 1: Write the proportion equation
   142,016 : 309,088 = 309,088 : x
2. Step 2: Convert to fraction form
   142,016/309,088 = 309,088/x
3. Step 3: Cross multiply
   142,016x = 309,088 × 309,088
4. Step 4: Simplify right side
   142,016x = 95,535,391,744
5. Step 5: Solve for x
   x = 95,535,391,744/142,016
6. Step 6: Final answer
   x = 672,708.65