Finding the Fourth Proportional to 404,019.86, 557,551.70 and 222,738.28

Step by Step Solution

1. Step 1: Write the proportion equation
   404,019.86 : 557,551.70 = 222,738.28 : x
2. Step 2: Convert to fraction form
   404,019.86/557,551.70 = 222,738.28/x
3. Step 3: Cross multiply
   404,019.86x = 557,551.70 × 222,738.28
4. Step 4: Simplify right side
   404,019.86x = 124,188,104,438.16
5. Step 5: Solve for x
   x = 124,188,104,438.16/404,019.86
6. Step 6: Final answer
   x = 307,381.19