Finding the Fourth Proportional to 3,834.16, 5,290.54 and 2,155.23

Step by Step Solution

1. Step 1: Write the proportion equation
   3,834.16 : 5,290.54 = 2,155.23 : x
2. Step 2: Convert to fraction form
   3,834.16/5,290.54 = 2,155.23/x
3. Step 3: Cross multiply
   3,834.16x = 5,290.54 × 2,155.23
4. Step 4: Simplify right side
   3,834.16x = 11,402,330.52
5. Step 5: Solve for x
   x = 11,402,330.52/3,834.16
6. Step 6: Final answer
   x = 2,973.88