Finding the Third Proportional to 142,215.75 and 328,404.38

Step by Step Solution

1. Step 1: Write the proportion equation
   142,215.75 : 328,404.38 = 328,404.38 : x
2. Step 2: Convert to fraction form
   142,215.75/328,404.38 = 328,404.38/x
3. Step 3: Cross multiply
   142,215.75x = 328,404.38 × 328,404.38
4. Step 4: Simplify right side
   142,215.75x = 107,849,433,519.14
5. Step 5: Solve for x
   x = 107,849,433,519.14/142,215.75
6. Step 6: Final answer
   x = 758,350.84