Finding the Fourth Proportional to 404,392.38, 558,042.01 and 220,620.01

Step by Step Solution

1. Step 1: Write the proportion equation
   404,392.38 : 558,042.01 = 220,620.01 : x
2. Step 2: Convert to fraction form
   404,392.38/558,042.01 = 220,620.01/x
3. Step 3: Cross multiply
   404,392.38x = 558,042.01 × 220,620.01
4. Step 4: Simplify right side
   404,392.38x = 123,115,233,826.62
5. Step 5: Solve for x
   x = 123,115,233,826.62/404,392.38
6. Step 6: Final answer
   x = 304,444.99