Finding the Fourth Proportional to 355,074.50, 490,017.39 and 204,171.50

Step by Step Solution

1. Step 1: Write the proportion equation
   355,074.50 : 490,017.39 = 204,171.50 : x
2. Step 2: Convert to fraction form
   355,074.50/490,017.39 = 204,171.50/x
3. Step 3: Cross multiply
   355,074.50x = 490,017.39 × 204,171.50
4. Step 4: Simplify right side
   355,074.50x = 100,047,585,542.39
5. Step 5: Solve for x
   x = 100,047,585,542.39/355,074.50
6. Step 6: Final answer
   x = 281,765.05