Finding the Fourth Proportional to 3,789.88, 5,229.89 and 2,111.25

Step by Step Solution

1. Step 1: Write the proportion equation
   3,789.88 : 5,229.89 = 2,111.25 : x
2. Step 2: Convert to fraction form
   3,789.88/5,229.89 = 2,111.25/x
3. Step 3: Cross multiply
   3,789.88x = 5,229.89 × 2,111.25
4. Step 4: Simplify right side
   3,789.88x = 11,041,605.26
5. Step 5: Solve for x
   x = 11,041,605.26/3,789.88
6. Step 6: Final answer
   x = 2,913.44