Finding the Fourth Proportional to 321,082.20, 443,109.42 and 185,138.28

Step by Step Solution

1. Step 1: Write the proportion equation
   321,082.20 : 443,109.42 = 185,138.28 : x
2. Step 2: Convert to fraction form
   321,082.20/443,109.42 = 185,138.28/x
3. Step 3: Cross multiply
   321,082.20x = 443,109.42 × 185,138.28
4. Step 4: Simplify right side
   321,082.20x = 82,036,515,870.60
5. Step 5: Solve for x
   x = 82,036,515,870.60/321,082.20
6. Step 6: Final answer
   x = 255,500.04