Finding the Fourth Proportional to 2,289.72, 3,434.54 and 2,111.36

Step by Step Solution

1. Step 1: Write the proportion equation
   2,289.72 : 3,434.54 = 2,111.36 : x
2. Step 2: Convert to fraction form
   2,289.72/3,434.54 = 2,111.36/x
3. Step 3: Cross multiply
   2,289.72x = 3,434.54 × 2,111.36
4. Step 4: Simplify right side
   2,289.72x = 7,251,550.37
5. Step 5: Solve for x
   x = 7,251,550.37/2,289.72
6. Step 6: Final answer
   x = 3,167.00