Finding the Fourth Proportional to 403,789.30, 605,538.15 and 204,043.30

Step by Step Solution

1. Step 1: Write the proportion equation
   403,789.30 : 605,538.15 = 204,043.30 : x
2. Step 2: Convert to fraction form
   403,789.30/605,538.15 = 204,043.30/x
3. Step 3: Cross multiply
   403,789.30x = 605,538.15 × 204,043.30
4. Step 4: Simplify right side
   403,789.30x = 123,556,002,401.90
5. Step 5: Solve for x
   x = 123,556,002,401.90/403,789.30
6. Step 6: Final answer
   x = 305,991.27