Finding the Third Proportional to 142,687 and 301,279

Step by Step Solution

1. Step 1: Write the proportion equation
   142,687 : 301,279 = 301,279 : x
2. Step 2: Convert to fraction form
   142,687/301,279 = 301,279/x
3. Step 3: Cross multiply
   142,687x = 301,279 × 301,279
4. Step 4: Simplify right side
   142,687x = 90,769,035,841
5. Step 5: Solve for x
   x = 90,769,035,841/142,687
6. Step 6: Final answer
   x = 636,140.89