Finding the Fourth Proportional to 2,143.27, 3,216.12 and 1,323.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,143.27 : 3,216.12 = 1,323.55 : x
2. Step 2: Convert to fraction form
   2,143.27/3,216.12 = 1,323.55/x
3. Step 3: Cross multiply
   2,143.27x = 3,216.12 × 1,323.55
4. Step 4: Simplify right side
   2,143.27x = 4,256,695.63
5. Step 5: Solve for x
   x = 4,256,695.63/2,143.27
6. Step 6: Final answer
   x = 1,986.08