Finding the Fourth Proportional to 2,557.49, 3,834.57 and 1,222.73

Step by Step Solution

1. Step 1: Write the proportion equation
   2,557.49 : 3,834.57 = 1,222.73 : x
2. Step 2: Convert to fraction form
   2,557.49/3,834.57 = 1,222.73/x
3. Step 3: Cross multiply
   2,557.49x = 3,834.57 × 1,222.73
4. Step 4: Simplify right side
   2,557.49x = 4,688,624.60
5. Step 5: Solve for x
   x = 4,688,624.60/2,557.49
6. Step 6: Final answer
   x = 1,833.30