Finding the Fourth Proportional to 404,659.31, 558,426.70 and 223,371.30

Step by Step Solution

1. Step 1: Write the proportion equation
   404,659.31 : 558,426.70 = 223,371.30 : x
2. Step 2: Convert to fraction form
   404,659.31/558,426.70 = 223,371.30/x
3. Step 3: Cross multiply
   404,659.31x = 558,426.70 × 223,371.30
4. Step 4: Simplify right side
   404,659.31x = 124,736,494,583.15
5. Step 5: Solve for x
   x = 124,736,494,583.15/404,659.31
6. Step 6: Final answer
   x = 308,250.65