Finding the Fourth Proportional to 2,109.31, 2,910.54 and 1,323.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,109.31 : 2,910.54 = 1,323.61 : x
2. Step 2: Convert to fraction form
   2,109.31/2,910.54 = 1,323.61/x
3. Step 3: Cross multiply
   2,109.31x = 2,910.54 × 1,323.61
4. Step 4: Simplify right side
   2,109.31x = 3,852,419.85
5. Step 5: Solve for x
   x = 3,852,419.85/2,109.31
6. Step 6: Final answer
   x = 1,826.39