Finding the Fourth Proportional to 3,789.72, 5,229.50 and 2,111.00

Step by Step Solution

1. Step 1: Write the proportion equation
   3,789.72 : 5,229.50 = 2,111.00 : x
2. Step 2: Convert to fraction form
   3,789.72/5,229.50 = 2,111.00/x
3. Step 3: Cross multiply
   3,789.72x = 5,229.50 × 2,111.00
4. Step 4: Simplify right side
   3,789.72x = 11,039,437.80
5. Step 5: Solve for x
   x = 11,039,437.80/3,789.72
6. Step 6: Final answer
   x = 2,913.00