Finding the Third Proportional to 142,872 and 301,648

Step by Step Solution

1. Step 1: Write the proportion equation
   142,872 : 301,648 = 301,648 : x
2. Step 2: Convert to fraction form
   142,872/301,648 = 301,648/x
3. Step 3: Cross multiply
   142,872x = 301,648 × 301,648
4. Step 4: Simplify right side
   142,872x = 90,991,515,904
5. Step 5: Solve for x
   x = 90,991,515,904/142,872
6. Step 6: Final answer
   x = 636,874.38