Finding the Fourth Proportional to 2,111.40, 2,910.66 and 1,411.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.40 : 2,910.66 = 1,411.56 : x
2. Step 2: Convert to fraction form
   2,111.40/2,910.66 = 1,411.56/x
3. Step 3: Cross multiply
   2,111.40x = 2,910.66 × 1,411.56
4. Step 4: Simplify right side
   2,111.40x = 4,108,571.23
5. Step 5: Solve for x
   x = 4,108,571.23/2,111.40
6. Step 6: Final answer
   x = 1,945.90