Finding the Fourth Proportional to 321,644.17, 443,578.39 and 200,796.58

Step by Step Solution

1. Step 1: Write the proportion equation
   321,644.17 : 443,578.39 = 200,796.58 : x
2. Step 2: Convert to fraction form
   321,644.17/443,578.39 = 200,796.58/x
3. Step 3: Cross multiply
   321,644.17x = 443,578.39 × 200,796.58
4. Step 4: Simplify right side
   321,644.17x = 89,069,023,673.91
5. Step 5: Solve for x
   x = 89,069,023,673.91/321,644.17
6. Step 6: Final answer
   x = 276,917.89