Finding the Fourth Proportional to 2,078.31, 2,851.93 and 1,890.37

Step by Step Solution

1. Step 1: Write the proportion equation
   2,078.31 : 2,851.93 = 1,890.37 : x
2. Step 2: Convert to fraction form
   2,078.31/2,851.93 = 1,890.37/x
3. Step 3: Cross multiply
   2,078.31x = 2,851.93 × 1,890.37
4. Step 4: Simplify right side
   2,078.31x = 5,391,208.84
5. Step 5: Solve for x
   x = 5,391,208.84/2,078.31
6. Step 6: Final answer
   x = 2,594.03