Finding the Fourth Proportional to 2,085.68, 3,139.82 and 1,874

Step by Step Solution

1. Step 1: Write the proportion equation
   2,085.68 : 3,139.82 = 1,874 : x
2. Step 2: Convert to fraction form
   2,085.68/3,139.82 = 1,874/x
3. Step 3: Cross multiply
   2,085.68x = 3,139.82 × 1,874
4. Step 4: Simplify right side
   2,085.68x = 5,884,022.68
5. Step 5: Solve for x
   x = 5,884,022.68/2,085.68
6. Step 6: Final answer
   x = 2,821.15