Finding the Fourth Proportional to 3,834.37, 5,291.46 and 2,155.78

Step by Step Solution

1. Step 1: Write the proportion equation
   3,834.37 : 5,291.46 = 2,155.78 : x
2. Step 2: Convert to fraction form
   3,834.37/5,291.46 = 2,155.78/x
3. Step 3: Cross multiply
   3,834.37x = 5,291.46 × 2,155.78
4. Step 4: Simplify right side
   3,834.37x = 11,407,230.25
5. Step 5: Solve for x
   x = 11,407,230.25/3,834.37
6. Step 6: Final answer
   x = 2,974.99