Finding the Fourth Proportional to 2,386.91, 3,293.71 and 1,378.54

Step by Step Solution

1. Step 1: Write the proportion equation
   2,386.91 : 3,293.71 = 1,378.54 : x
2. Step 2: Convert to fraction form
   2,386.91/3,293.71 = 1,378.54/x
3. Step 3: Cross multiply
   2,386.91x = 3,293.71 × 1,378.54
4. Step 4: Simplify right side
   2,386.91x = 4,540,520.94
5. Step 5: Solve for x
   x = 4,540,520.94/2,386.91
6. Step 6: Final answer
   x = 1,902.26