Finding the Fourth Proportional to 2,141.91, 3,208.71 and 1,409.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,141.91 : 3,208.71 = 1,409.28 : x
2. Step 2: Convert to fraction form
   2,141.91/3,208.71 = 1,409.28/x
3. Step 3: Cross multiply
   2,141.91x = 3,208.71 × 1,409.28
4. Step 4: Simplify right side
   2,141.91x = 4,521,970.83
5. Step 5: Solve for x
   x = 4,521,970.83/2,141.91
6. Step 6: Final answer
   x = 2,111.19