Finding the Fourth Proportional to 2,074.94, 3,112.38 and 842.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,074.94 : 3,112.38 = 842.05 : x
2. Step 2: Convert to fraction form
   2,074.94/3,112.38 = 842.05/x
3. Step 3: Cross multiply
   2,074.94x = 3,112.38 × 842.05
4. Step 4: Simplify right side
   2,074.94x = 2,620,794.59
5. Step 5: Solve for x
   x = 2,620,794.59/2,074.94
6. Step 6: Final answer
   x = 1,263.07