Finding the Fourth Proportional to 3,834.17, 5,290.22 and 2,155.25

Step by Step Solution

1. Step 1: Write the proportion equation
   3,834.17 : 5,290.22 = 2,155.25 : x
2. Step 2: Convert to fraction form
   3,834.17/5,290.22 = 2,155.25/x
3. Step 3: Cross multiply
   3,834.17x = 5,290.22 × 2,155.25
4. Step 4: Simplify right side
   3,834.17x = 11,401,709.43
5. Step 5: Solve for x
   x = 11,401,709.43/3,834.17
6. Step 6: Final answer
   x = 2,973.71