Finding the Third Proportional to 142,661.25 and 301,239

Step by Step Solution

1. Step 1: Write the proportion equation
   142,661.25 : 301,239 = 301,239 : x
2. Step 2: Convert to fraction form
   142,661.25/301,239 = 301,239/x
3. Step 3: Cross multiply
   142,661.25x = 301,239 × 301,239
4. Step 4: Simplify right side
   142,661.25x = 90,744,935,121
5. Step 5: Solve for x
   x = 90,744,935,121/142,661.25
6. Step 6: Final answer
   x = 636,086.78