Finding the Fourth Proportional to 2,789.91, 4,185.27 and 842.13

Step by Step Solution

1. Step 1: Write the proportion equation
   2,789.91 : 4,185.27 = 842.13 : x
2. Step 2: Convert to fraction form
   2,789.91/4,185.27 = 842.13/x
3. Step 3: Cross multiply
   2,789.91x = 4,185.27 × 842.13
4. Step 4: Simplify right side
   2,789.91x = 3,524,541.43
5. Step 5: Solve for x
   x = 3,524,541.43/2,789.91
6. Step 6: Final answer
   x = 1,263.32