Finding the Fourth Proportional to 2,182.55, 3,273.98 and 721.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,182.55 : 3,273.98 = 721.72 : x
2. Step 2: Convert to fraction form
   2,182.55/3,273.98 = 721.72/x
3. Step 3: Cross multiply
   2,182.55x = 3,273.98 × 721.72
4. Step 4: Simplify right side
   2,182.55x = 2,362,885.05
5. Step 5: Solve for x
   x = 2,362,885.05/2,182.55
6. Step 6: Final answer
   x = 1,082.62