Finding the Third Proportional to 142,023.38 and 309,469.50

Step by Step Solution

1. Step 1: Write the proportion equation
   142,023.38 : 309,469.50 = 309,469.50 : x
2. Step 2: Convert to fraction form
   142,023.38/309,469.50 = 309,469.50/x
3. Step 3: Cross multiply
   142,023.38x = 309,469.50 × 309,469.50
4. Step 4: Simplify right side
   142,023.38x = 95,771,371,430.25
5. Step 5: Solve for x
   x = 95,771,371,430.25/142,023.38
6. Step 6: Final answer
   x = 674,335.27