Finding the Fourth Proportional to 2,081.86, 3,105.17 and 1,805.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,081.86 : 3,105.17 = 1,805.76 : x
2. Step 2: Convert to fraction form
   2,081.86/3,105.17 = 1,805.76/x
3. Step 3: Cross multiply
   2,081.86x = 3,105.17 × 1,805.76
4. Step 4: Simplify right side
   2,081.86x = 5,607,191.78
5. Step 5: Solve for x
   x = 5,607,191.78/2,081.86
6. Step 6: Final answer
   x = 2,693.36