Finding the Third Proportional to 142,120 and 236,856

Step by Step Solution

1. Step 1: Write the proportion equation
   142,120 : 236,856 = 236,856 : x
2. Step 2: Convert to fraction form
   142,120/236,856 = 236,856/x
3. Step 3: Cross multiply
   142,120x = 236,856 × 236,856
4. Step 4: Simplify right side
   142,120x = 56,100,764,736
5. Step 5: Solve for x
   x = 56,100,764,736/142,120
6. Step 6: Final answer
   x = 394,742.22