Finding the Fourth Proportional to 321,320.72, 443,624.24 and 206,798.37

Step by Step Solution

1. Step 1: Write the proportion equation
   321,320.72 : 443,624.24 = 206,798.37 : x
2. Step 2: Convert to fraction form
   321,320.72/443,624.24 = 206,798.37/x
3. Step 3: Cross multiply
   321,320.72x = 443,624.24 × 206,798.37
4. Step 4: Simplify right side
   321,320.72x = 91,740,768,577.89
5. Step 5: Solve for x
   x = 91,740,768,577.89/321,320.72
6. Step 6: Final answer
   x = 285,511.52