Finding the Fourth Proportional to 404,390.17, 558,054.59 and 223,103.57

Step by Step Solution

1. Step 1: Write the proportion equation
   404,390.17 : 558,054.59 = 223,103.57 : x
2. Step 2: Convert to fraction form
   404,390.17/558,054.59 = 223,103.57/x
3. Step 3: Cross multiply
   404,390.17x = 558,054.59 × 223,103.57
4. Step 4: Simplify right side
   404,390.17x = 124,503,968,005.57
5. Step 5: Solve for x
   x = 124,503,968,005.57/404,390.17
6. Step 6: Final answer
   x = 307,880.80