Finding the Fourth Proportional to 404,579.34, 558,320.68 and 220,819.61

Step by Step Solution

1. Step 1: Write the proportion equation
   404,579.34 : 558,320.68 = 220,819.61 : x
2. Step 2: Convert to fraction form
   404,579.34/558,320.68 = 220,819.61/x
3. Step 3: Cross multiply
   404,579.34x = 558,320.68 × 220,819.61
4. Step 4: Simplify right side
   404,579.34x = 123,288,150,916.83
5. Step 5: Solve for x
   x = 123,288,150,916.83/404,579.34
6. Step 6: Final answer
   x = 304,731.70