Finding the Fourth Proportional to 2,081.83, 3,122.77 and 911.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,081.83 : 3,122.77 = 911.59 : x
2. Step 2: Convert to fraction form
   2,081.83/3,122.77 = 911.59/x
3. Step 3: Cross multiply
   2,081.83x = 3,122.77 × 911.59
4. Step 4: Simplify right side
   2,081.83x = 2,846,685.90
5. Step 5: Solve for x
   x = 2,846,685.90/2,081.83
6. Step 6: Final answer
   x = 1,367.40