Finding the Fourth Proportional to 2,083.58, 3,121.85 and 1,259.33

Step by Step Solution

1. Step 1: Write the proportion equation
   2,083.58 : 3,121.85 = 1,259.33 : x
2. Step 2: Convert to fraction form
   2,083.58/3,121.85 = 1,259.33/x
3. Step 3: Cross multiply
   2,083.58x = 3,121.85 × 1,259.33
4. Step 4: Simplify right side
   2,083.58x = 3,931,450.31
5. Step 5: Solve for x
   x = 3,931,450.31/2,083.58
6. Step 6: Final answer
   x = 1,886.88