Finding the Fourth Proportional to 2,760.88, 4,141.12 and 812.92

Step by Step Solution

1. Step 1: Write the proportion equation
   2,760.88 : 4,141.12 = 812.92 : x
2. Step 2: Convert to fraction form
   2,760.88/4,141.12 = 812.92/x
3. Step 3: Cross multiply
   2,760.88x = 4,141.12 × 812.92
4. Step 4: Simplify right side
   2,760.88x = 3,366,399.27
5. Step 5: Solve for x
   x = 3,366,399.27/2,760.88
6. Step 6: Final answer
   x = 1,219.32