Finding the Fourth Proportional to 404,060.22, 557,668.89 and 243,078.03

Step by Step Solution

1. Step 1: Write the proportion equation
   404,060.22 : 557,668.89 = 243,078.03 : x
2. Step 2: Convert to fraction form
   404,060.22/557,668.89 = 243,078.03/x
3. Step 3: Cross multiply
   404,060.22x = 557,668.89 × 243,078.03
4. Step 4: Simplify right side
   404,060.22x = 135,557,055,173.49
5. Step 5: Solve for x
   x = 135,557,055,173.49/404,060.22
6. Step 6: Final answer
   x = 335,487.26