Finding the Fourth Proportional to 404,689.69, 558,431.94 and 223,389.91

Step by Step Solution

1. Step 1: Write the proportion equation
   404,689.69 : 558,431.94 = 223,389.91 : x
2. Step 2: Convert to fraction form
   404,689.69/558,431.94 = 223,389.91/x
3. Step 3: Cross multiply
   404,689.69x = 558,431.94 × 223,389.91
4. Step 4: Simplify right side
   404,689.69x = 124,748,060,817.73
5. Step 5: Solve for x
   x = 124,748,060,817.73/404,689.69
6. Step 6: Final answer
   x = 308,256.09