Finding the Fourth Proportional to 2,760.28, 4,140.83 and 911.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,760.28 : 4,140.83 = 911.59 : x
2. Step 2: Convert to fraction form
   2,760.28/4,140.83 = 911.59/x
3. Step 3: Cross multiply
   2,760.28x = 4,140.83 × 911.59
4. Step 4: Simplify right side
   2,760.28x = 3,774,713.96
5. Step 5: Solve for x
   x = 3,774,713.96/2,760.28
6. Step 6: Final answer
   x = 1,367.51