Finding the Fourth Proportional to 321,648.42, 443,584.17 and 200,800.86

Step by Step Solution

1. Step 1: Write the proportion equation
   321,648.42 : 443,584.17 = 200,800.86 : x
2. Step 2: Convert to fraction form
   321,648.42/443,584.17 = 200,800.86/x
3. Step 3: Cross multiply
   321,648.42x = 443,584.17 × 200,800.86
4. Step 4: Simplify right side
   321,648.42x = 89,072,082,818.39
5. Step 5: Solve for x
   x = 89,072,082,818.39/321,648.42
6. Step 6: Final answer
   x = 276,923.74