Finding the Fourth Proportional to 2,380.80, 3,284.52 and 1,386

Step by Step Solution

1. Step 1: Write the proportion equation
   2,380.80 : 3,284.52 = 1,386 : x
2. Step 2: Convert to fraction form
   2,380.80/3,284.52 = 1,386/x
3. Step 3: Cross multiply
   2,380.80x = 3,284.52 × 1,386
4. Step 4: Simplify right side
   2,380.80x = 4,552,344.72
5. Step 5: Solve for x
   x = 4,552,344.72/2,380.80
6. Step 6: Final answer
   x = 1,912.11