Finding the Fourth Proportional to 403,916.27, 557,401.37 and 222,628.55

Step by Step Solution

1. Step 1: Write the proportion equation
   403,916.27 : 557,401.37 = 222,628.55 : x
2. Step 2: Convert to fraction form
   403,916.27/557,401.37 = 222,628.55/x
3. Step 3: Cross multiply
   403,916.27x = 557,401.37 × 222,628.55
4. Step 4: Simplify right side
   403,916.27x = 124,093,454,870.96
5. Step 5: Solve for x
   x = 124,093,454,870.96/403,916.27
6. Step 6: Final answer
   x = 307,225.69