Finding the Fourth Proportional to 2,085.89, 3,122.89 and 1,591.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,085.89 : 3,122.89 = 1,591.72 : x
2. Step 2: Convert to fraction form
   2,085.89/3,122.89 = 1,591.72/x
3. Step 3: Cross multiply
   2,085.89x = 3,122.89 × 1,591.72
4. Step 4: Simplify right side
   2,085.89x = 4,970,754.68
5. Step 5: Solve for x
   x = 4,970,754.68/2,085.89
6. Step 6: Final answer
   x = 2,383.04