Finding the Fourth Proportional to 404,699.59, 558,489.96 and 223,411.62

Step by Step Solution

1. Step 1: Write the proportion equation
   404,699.59 : 558,489.96 = 223,411.62 : x
2. Step 2: Convert to fraction form
   404,699.59/558,489.96 = 223,411.62/x
3. Step 3: Cross multiply
   404,699.59x = 558,489.96 × 223,411.62
4. Step 4: Simplify right side
   404,699.59x = 124,773,146,298.51
5. Step 5: Solve for x
   x = 124,773,146,298.51/404,699.59
6. Step 6: Final answer
   x = 308,310.53