Finding the Fourth Proportional to 443,217.86, 664,923.96 and 143,728.72

Step by Step Solution

1. Step 1: Write the proportion equation
   443,217.86 : 664,923.96 = 143,728.72 : x
2. Step 2: Convert to fraction form
   443,217.86/664,923.96 = 143,728.72/x
3. Step 3: Cross multiply
   443,217.86x = 664,923.96 × 143,728.72
4. Step 4: Simplify right side
   443,217.86x = 95,568,668,005.82
5. Step 5: Solve for x
   x = 95,568,668,005.82/443,217.86
6. Step 6: Final answer
   x = 215,624.59