Finding the Fourth Proportional to 2,912.76, 4,369.18 and 721.49

Step by Step Solution

1. Step 1: Write the proportion equation
   2,912.76 : 4,369.18 = 721.49 : x
2. Step 2: Convert to fraction form
   2,912.76/4,369.18 = 721.49/x
3. Step 3: Cross multiply
   2,912.76x = 4,369.18 × 721.49
4. Step 4: Simplify right side
   2,912.76x = 3,152,297.90
5. Step 5: Solve for x
   x = 3,152,297.90/2,912.76
6. Step 6: Final answer
   x = 1,082.24