Finding the Fourth Proportional to 3,834.50, 5,291.22 and 2,155.82

Step by Step Solution

1. Step 1: Write the proportion equation
   3,834.50 : 5,291.22 = 2,155.82 : x
2. Step 2: Convert to fraction form
   3,834.50/5,291.22 = 2,155.82/x
3. Step 3: Cross multiply
   3,834.50x = 5,291.22 × 2,155.82
4. Step 4: Simplify right side
   3,834.50x = 11,406,917.90
5. Step 5: Solve for x
   x = 11,406,917.90/3,834.50
6. Step 6: Final answer
   x = 2,974.81