Finding the Fourth Proportional to 2,741.28, 4,111.86 and 689.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,741.28 : 4,111.86 = 689.28 : x
2. Step 2: Convert to fraction form
   2,741.28/4,111.86 = 689.28/x
3. Step 3: Cross multiply
   2,741.28x = 4,111.86 × 689.28
4. Step 4: Simplify right side
   2,741.28x = 2,834,222.86
5. Step 5: Solve for x
   x = 2,834,222.86/2,741.28
6. Step 6: Final answer
   x = 1,033.90