Finding the Fourth Proportional to 2,381.52, 3,286.23 and 1,386.71

Step by Step Solution

1. Step 1: Write the proportion equation
   2,381.52 : 3,286.23 = 1,386.71 : x
2. Step 2: Convert to fraction form
   2,381.52/3,286.23 = 1,386.71/x
3. Step 3: Cross multiply
   2,381.52x = 3,286.23 × 1,386.71
4. Step 4: Simplify right side
   2,381.52x = 4,557,048.00
5. Step 5: Solve for x
   x = 4,557,048.00/2,381.52
6. Step 6: Final answer
   x = 1,913.50