Finding the Fourth Proportional to 3,789.81, 5,229.30 and 2,111.17

Step by Step Solution

1. Step 1: Write the proportion equation
   3,789.81 : 5,229.30 = 2,111.17 : x
2. Step 2: Convert to fraction form
   3,789.81/5,229.30 = 2,111.17/x
3. Step 3: Cross multiply
   3,789.81x = 5,229.30 × 2,111.17
4. Step 4: Simplify right side
   3,789.81x = 11,039,941.28
5. Step 5: Solve for x
   x = 11,039,941.28/3,789.81
6. Step 6: Final answer
   x = 2,913.06