Finding the Fourth Proportional to 2,386.55, 3,293.04 and 1,391.87

Step by Step Solution

1. Step 1: Write the proportion equation
   2,386.55 : 3,293.04 = 1,391.87 : x
2. Step 2: Convert to fraction form
   2,386.55/3,293.04 = 1,391.87/x
3. Step 3: Cross multiply
   2,386.55x = 3,293.04 × 1,391.87
4. Step 4: Simplify right side
   2,386.55x = 4,583,483.58
5. Step 5: Solve for x
   x = 4,583,483.58/2,386.55
6. Step 6: Final answer
   x = 1,920.55