Finding the Fourth Proportional to 2,789.80, 4,185.73 and 842.01

Step by Step Solution

1. Step 1: Write the proportion equation
   2,789.80 : 4,185.73 = 842.01 : x
2. Step 2: Convert to fraction form
   2,789.80/4,185.73 = 842.01/x
3. Step 3: Cross multiply
   2,789.80x = 4,185.73 × 842.01
4. Step 4: Simplify right side
   2,789.80x = 3,524,426.52
5. Step 5: Solve for x
   x = 3,524,426.52/2,789.80
6. Step 6: Final answer
   x = 1,263.33