Finding the Fourth Proportional to 2,386.29, 3,293.39 and 1,391.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,386.29 : 3,293.39 = 1,391.88 : x
2. Step 2: Convert to fraction form
   2,386.29/3,293.39 = 1,391.88/x
3. Step 3: Cross multiply
   2,386.29x = 3,293.39 × 1,391.88
4. Step 4: Simplify right side
   2,386.29x = 4,584,003.67
5. Step 5: Solve for x
   x = 4,584,003.67/2,386.29
6. Step 6: Final answer
   x = 1,920.98