Finding the Fourth Proportional to 404,663.81, 558,449.27 and 220,912.17

Step by Step Solution

1. Step 1: Write the proportion equation
   404,663.81 : 558,449.27 = 220,912.17 : x
2. Step 2: Convert to fraction form
   404,663.81/558,449.27 = 220,912.17/x
3. Step 3: Cross multiply
   404,663.81x = 558,449.27 × 220,912.17
4. Step 4: Simplify right side
   404,663.81x = 123,368,240,070.62
5. Step 5: Solve for x
   x = 123,368,240,070.62/404,663.81
6. Step 6: Final answer
   x = 304,866.01