Finding the Fourth Proportional to 3,726.42, 5,143.38 and 2,155.43

Step by Step Solution

1. Step 1: Write the proportion equation
   3,726.42 : 5,143.38 = 2,155.43 : x
2. Step 2: Convert to fraction form
   3,726.42/5,143.38 = 2,155.43/x
3. Step 3: Cross multiply
   3,726.42x = 5,143.38 × 2,155.43
4. Step 4: Simplify right side
   3,726.42x = 11,086,183.52
5. Step 5: Solve for x
   x = 11,086,183.52/3,726.42
6. Step 6: Final answer
   x = 2,975.02