Finding the Fourth Proportional to 404,679.26, 603,501.47 and 399,249.42

Step by Step Solution

1. Step 1: Write the proportion equation
   404,679.26 : 603,501.47 = 399,249.42 : x
2. Step 2: Convert to fraction form
   404,679.26/603,501.47 = 399,249.42/x
3. Step 3: Cross multiply
   404,679.26x = 603,501.47 × 399,249.42
4. Step 4: Simplify right side
   404,679.26x = 240,947,612,499.15
5. Step 5: Solve for x
   x = 240,947,612,499.15/404,679.26
6. Step 6: Final answer
   x = 595,403.91