Finding the Fourth Proportional to 404,020.69, 557,534.18 and 220,255.47

Step by Step Solution

1. Step 1: Write the proportion equation
   404,020.69 : 557,534.18 = 220,255.47 : x
2. Step 2: Convert to fraction form
   404,020.69/557,534.18 = 220,255.47/x
3. Step 3: Cross multiply
   404,020.69x = 557,534.18 × 220,255.47
4. Step 4: Simplify right side
   404,020.69x = 122,799,953,407.60
5. Step 5: Solve for x
   x = 122,799,953,407.60/404,020.69
6. Step 6: Final answer
   x = 303,944.72