Finding the Third Proportional to 142,332 and 309,720

Step by Step Solution

1. Step 1: Write the proportion equation
   142,332 : 309,720 = 309,720 : x
2. Step 2: Convert to fraction form
   142,332/309,720 = 309,720/x
3. Step 3: Cross multiply
   142,332x = 309,720 × 309,720
4. Step 4: Simplify right side
   142,332x = 95,926,478,400
5. Step 5: Solve for x
   x = 95,926,478,400/142,332
6. Step 6: Final answer
   x = 673,962.84