Finding the Third Proportional to 142,311.38 and 305,728.31

Step by Step Solution

1. Step 1: Write the proportion equation
   142,311.38 : 305,728.31 = 305,728.31 : x
2. Step 2: Convert to fraction form
   142,311.38/305,728.31 = 305,728.31/x
3. Step 3: Cross multiply
   142,311.38x = 305,728.31 × 305,728.31
4. Step 4: Simplify right side
   142,311.38x = 93,469,801,064.10
5. Step 5: Solve for x
   x = 93,469,801,064.10/142,311.38
6. Step 6: Final answer
   x = 656,797.82