Finding the Fourth Proportional to 3,834.79, 5,290.52 and 2,155.82

Step by Step Solution

1. Step 1: Write the proportion equation
   3,834.79 : 5,290.52 = 2,155.82 : x
2. Step 2: Convert to fraction form
   3,834.79/5,290.52 = 2,155.82/x
3. Step 3: Cross multiply
   3,834.79x = 5,290.52 × 2,155.82
4. Step 4: Simplify right side
   3,834.79x = 11,405,408.83
5. Step 5: Solve for x
   x = 11,405,408.83/3,834.79
6. Step 6: Final answer
   x = 2,974.19