Finding the Fourth Proportional to 2,381.43, 3,286.37 and 1,387.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,381.43 : 3,286.37 = 1,387.38 : x
2. Step 2: Convert to fraction form
   2,381.43/3,286.37 = 1,387.38/x
3. Step 3: Cross multiply
   2,381.43x = 3,286.37 × 1,387.38
4. Step 4: Simplify right side
   2,381.43x = 4,559,441.32
5. Step 5: Solve for x
   x = 4,559,441.32/2,381.43
6. Step 6: Final answer
   x = 1,914.58