Finding the Fourth Proportional to 404,072.10, 557,623.38 and 222,791.10

Step by Step Solution

1. Step 1: Write the proportion equation
   404,072.10 : 557,623.38 = 222,791.10 : x
2. Step 2: Convert to fraction form
   404,072.10/557,623.38 = 222,791.10/x
3. Step 3: Cross multiply
   404,072.10x = 557,623.38 × 222,791.10
4. Step 4: Simplify right side
   404,072.10x = 124,233,526,215.92
5. Step 5: Solve for x
   x = 124,233,526,215.92/404,072.10
6. Step 6: Final answer
   x = 307,453.86