Finding the Fourth Proportional to 404,729.01, 558,517.16 and 220,961.30

Step by Step Solution

1. Step 1: Write the proportion equation
   404,729.01 : 558,517.16 = 220,961.30 : x
2. Step 2: Convert to fraction form
   404,729.01/558,517.16 = 220,961.30/x
3. Step 3: Cross multiply
   404,729.01x = 558,517.16 × 220,961.30
4. Step 4: Simplify right side
   404,729.01x = 123,410,673,848.52
5. Step 5: Solve for x
   x = 123,410,673,848.52/404,729.01
6. Step 6: Final answer
   x = 304,921.74