Finding the Fourth Proportional to 2,385.89, 3,292.55 and 1,391.27

Step by Step Solution

1. Step 1: Write the proportion equation
   2,385.89 : 3,292.55 = 1,391.27 : x
2. Step 2: Convert to fraction form
   2,385.89/3,292.55 = 1,391.27/x
3. Step 3: Cross multiply
   2,385.89x = 3,292.55 × 1,391.27
4. Step 4: Simplify right side
   2,385.89x = 4,580,802.62
5. Step 5: Solve for x
   x = 4,580,802.62/2,385.89
6. Step 6: Final answer
   x = 1,919.96