Finding the Fourth Proportional to 2,386.05, 3,292.77 and 1,391.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,386.05 : 3,292.77 = 1,391.94 : x
2. Step 2: Convert to fraction form
   2,386.05/3,292.77 = 1,391.94/x
3. Step 3: Cross multiply
   2,386.05x = 3,292.77 × 1,391.94
4. Step 4: Simplify right side
   2,386.05x = 4,583,338.27
5. Step 5: Solve for x
   x = 4,583,338.27/2,386.05
6. Step 6: Final answer
   x = 1,920.89