Finding the Fourth Proportional to 2,721.89, 4,082.28 and 773.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,721.89 : 4,082.28 = 773.57 : x
2. Step 2: Convert to fraction form
   2,721.89/4,082.28 = 773.57/x
3. Step 3: Cross multiply
   2,721.89x = 4,082.28 × 773.57
4. Step 4: Simplify right side
   2,721.89x = 3,157,929.34
5. Step 5: Solve for x
   x = 3,157,929.34/2,721.89
6. Step 6: Final answer
   x = 1,160.20