Finding the Fourth Proportional to 404,612.69, 558,369.59 and 223,320.65

Step by Step Solution

1. Step 1: Write the proportion equation
   404,612.69 : 558,369.59 = 223,320.65 : x
2. Step 2: Convert to fraction form
   404,612.69/558,369.59 = 223,320.65/x
3. Step 3: Cross multiply
   404,612.69x = 558,369.59 × 223,320.65
4. Step 4: Simplify right side
   404,612.69x = 124,695,455,870.58
5. Step 5: Solve for x
   x = 124,695,455,870.58/404,612.69
6. Step 6: Final answer
   x = 308,184.74