Finding the Fourth Proportional to 404,643.86, 558,408.55 and 223,355.83

Step by Step Solution

1. Step 1: Write the proportion equation
   404,643.86 : 558,408.55 = 223,355.83 : x
2. Step 2: Convert to fraction form
   404,643.86/558,408.55 = 223,355.83/x
3. Step 3: Cross multiply
   404,643.86x = 558,408.55 × 223,355.83
4. Step 4: Simplify right side
   404,643.86x = 124,723,803,209.94
5. Step 5: Solve for x
   x = 124,723,803,209.94/404,643.86
6. Step 6: Final answer
   x = 308,231.06