Finding the Fourth Proportional to 404,271.80, 605,897.40 and 204,647.30

Step by Step Solution

1. Step 1: Write the proportion equation
   404,271.80 : 605,897.40 = 204,647.30 : x
2. Step 2: Convert to fraction form
   404,271.80/605,897.40 = 204,647.30/x
3. Step 3: Cross multiply
   404,271.80x = 605,897.40 × 204,647.30
4. Step 4: Simplify right side
   404,271.80x = 123,995,266,987.02
5. Step 5: Solve for x
   x = 123,995,266,987.02/404,271.80
6. Step 6: Final answer
   x = 306,712.63