Finding the Fourth Proportional to 2,085.17, 3,131.34 and 1,851.44

Step by Step Solution

1. Step 1: Write the proportion equation
   2,085.17 : 3,131.34 = 1,851.44 : x
2. Step 2: Convert to fraction form
   2,085.17/3,131.34 = 1,851.44/x
3. Step 3: Cross multiply
   2,085.17x = 3,131.34 × 1,851.44
4. Step 4: Simplify right side
   2,085.17x = 5,797,465.53
5. Step 5: Solve for x
   x = 5,797,465.53/2,085.17
6. Step 6: Final answer
   x = 2,780.33