Finding the Fourth Proportional to 3,879.43, 5,353.59 and 2,111.02

Step by Step Solution

1. Step 1: Write the proportion equation
   3,879.43 : 5,353.59 = 2,111.02 : x
2. Step 2: Convert to fraction form
   3,879.43/5,353.59 = 2,111.02/x
3. Step 3: Cross multiply
   3,879.43x = 5,353.59 × 2,111.02
4. Step 4: Simplify right side
   3,879.43x = 11,301,535.56
5. Step 5: Solve for x
   x = 11,301,535.56/3,879.43
6. Step 6: Final answer
   x = 2,913.19