Finding the Fourth Proportional to 2,161.95, 2,983.72 and 1,323.21

Step by Step Solution

1. Step 1: Write the proportion equation
   2,161.95 : 2,983.72 = 1,323.21 : x
2. Step 2: Convert to fraction form
   2,161.95/2,983.72 = 1,323.21/x
3. Step 3: Cross multiply
   2,161.95x = 2,983.72 × 1,323.21
4. Step 4: Simplify right side
   2,161.95x = 3,948,092.29
5. Step 5: Solve for x
   x = 3,948,092.29/2,161.95
6. Step 6: Final answer
   x = 1,826.17