Finding the Fourth Proportional to 3,833.57, 5,290.41 and 2,154.87

Step by Step Solution

1. Step 1: Write the proportion equation
   3,833.57 : 5,290.41 = 2,154.87 : x
2. Step 2: Convert to fraction form
   3,833.57/5,290.41 = 2,154.87/x
3. Step 3: Cross multiply
   3,833.57x = 5,290.41 × 2,154.87
4. Step 4: Simplify right side
   3,833.57x = 11,400,145.80
5. Step 5: Solve for x
   x = 11,400,145.80/3,833.57
6. Step 6: Final answer
   x = 2,973.77