Finding the Fourth Proportional to 443,218.86, 664,925.46 and 143,729.72

Step by Step Solution

1. Step 1: Write the proportion equation
   443,218.86 : 664,925.46 = 143,729.72 : x
2. Step 2: Convert to fraction form
   443,218.86/664,925.46 = 143,729.72/x
3. Step 3: Cross multiply
   443,218.86x = 664,925.46 × 143,729.72
4. Step 4: Simplify right side
   443,218.86x = 95,569,550,186.67
5. Step 5: Solve for x
   x = 95,569,550,186.67/443,218.86
6. Step 6: Final answer
   x = 215,626.09