Finding the Fourth Proportional to 3,789.71, 5,229.42 and 2,111.05

Step by Step Solution

1. Step 1: Write the proportion equation
   3,789.71 : 5,229.42 = 2,111.05 : x
2. Step 2: Convert to fraction form
   3,789.71/5,229.42 = 2,111.05/x
3. Step 3: Cross multiply
   3,789.71x = 5,229.42 × 2,111.05
4. Step 4: Simplify right side
   3,789.71x = 11,039,567.09
5. Step 5: Solve for x
   x = 11,039,567.09/3,789.71
6. Step 6: Final answer
   x = 2,913.04