Finding the Fourth Proportional to 404,584.50, 558,327.78 and 220,824.77

Step by Step Solution

1. Step 1: Write the proportion equation
   404,584.50 : 558,327.78 = 220,824.77 : x
2. Step 2: Convert to fraction form
   404,584.50/558,327.78 = 220,824.77/x
3. Step 3: Cross multiply
   404,584.50x = 558,327.78 × 220,824.77
4. Step 4: Simplify right side
   404,584.50x = 123,292,600,811.47
5. Step 5: Solve for x
   x = 123,292,600,811.47/404,584.50
6. Step 6: Final answer
   x = 304,738.81