Finding the Fourth Proportional to 2,381.48, 3,286.46 and 1,387.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,381.48 : 3,286.46 = 1,387.42 : x
2. Step 2: Convert to fraction form
   2,381.48/3,286.46 = 1,387.42/x
3. Step 3: Cross multiply
   2,381.48x = 3,286.46 × 1,387.42
4. Step 4: Simplify right side
   2,381.48x = 4,559,700.33
5. Step 5: Solve for x
   x = 4,559,700.33/2,381.48
6. Step 6: Final answer
   x = 1,914.65