Finding the Fourth Proportional to 3,834.81, 5,291.67 and 2,155.83

Step by Step Solution

1. Step 1: Write the proportion equation
   3,834.81 : 5,291.67 = 2,155.83 : x
2. Step 2: Convert to fraction form
   3,834.81/5,291.67 = 2,155.83/x
3. Step 3: Cross multiply
   3,834.81x = 5,291.67 × 2,155.83
4. Step 4: Simplify right side
   3,834.81x = 11,407,940.94
5. Step 5: Solve for x
   x = 11,407,940.94/3,834.81
6. Step 6: Final answer
   x = 2,974.84