Finding the Fourth Proportional to 404,708.15, 558,498.06 and 223,420.33

Step by Step Solution

1. Step 1: Write the proportion equation
   404,708.15 : 558,498.06 = 223,420.33 : x
2. Step 2: Convert to fraction form
   404,708.15/558,498.06 = 223,420.33/x
3. Step 3: Cross multiply
   404,708.15x = 558,498.06 × 223,420.33
4. Step 4: Simplify right side
   404,708.15x = 124,779,818,077.07
5. Step 5: Solve for x
   x = 124,779,818,077.07/404,708.15
6. Step 6: Final answer
   x = 308,320.50