Finding the Fourth Proportional to 2,789.92, 4,184.20 and 842.24

Step by Step Solution

1. Step 1: Write the proportion equation
   2,789.92 : 4,184.20 = 842.24 : x
2. Step 2: Convert to fraction form
   2,789.92/4,184.20 = 842.24/x
3. Step 3: Cross multiply
   2,789.92x = 4,184.20 × 842.24
4. Step 4: Simplify right side
   2,789.92x = 3,524,100.61
5. Step 5: Solve for x
   x = 3,524,100.61/2,789.92
6. Step 6: Final answer
   x = 1,263.15