Finding the Fourth Proportional to 2,912.82, 4,369.17 and 721.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,912.82 : 4,369.17 = 721.56 : x
2. Step 2: Convert to fraction form
   2,912.82/4,369.17 = 721.56/x
3. Step 3: Cross multiply
   2,912.82x = 4,369.17 × 721.56
4. Step 4: Simplify right side
   2,912.82x = 3,152,618.31
5. Step 5: Solve for x
   x = 3,152,618.31/2,912.82
6. Step 6: Final answer
   x = 1,082.33