Finding the Fourth Proportional to 321,545.30, 443,630.39 and 185,561.28

Step by Step Solution

1. Step 1: Write the proportion equation
   321,545.30 : 443,630.39 = 185,561.28 : x
2. Step 2: Convert to fraction form
   321,545.30/443,630.39 = 185,561.28/x
3. Step 3: Cross multiply
   321,545.30x = 443,630.39 × 185,561.28
4. Step 4: Simplify right side
   321,545.30x = 82,320,622,087.49
5. Step 5: Solve for x
   x = 82,320,622,087.49/321,545.30
6. Step 6: Final answer
   x = 256,015.63