Finding the Third Proportional to 142,584 and 309,452

Step by Step Solution

1. Step 1: Write the proportion equation
   142,584 : 309,452 = 309,452 : x
2. Step 2: Convert to fraction form
   142,584/309,452 = 309,452/x
3. Step 3: Cross multiply
   142,584x = 309,452 × 309,452
4. Step 4: Simplify right side
   142,584x = 95,760,540,304
5. Step 5: Solve for x
   x = 95,760,540,304/142,584
6. Step 6: Final answer
   x = 671,607.90