Finding the Fourth Proportional to 2,381.72, 3,286.33 and 1,543.49

Step by Step Solution

1. Step 1: Write the proportion equation
   2,381.72 : 3,286.33 = 1,543.49 : x
2. Step 2: Convert to fraction form
   2,381.72/3,286.33 = 1,543.49/x
3. Step 3: Cross multiply
   2,381.72x = 3,286.33 × 1,543.49
4. Step 4: Simplify right side
   2,381.72x = 5,072,397.20
5. Step 5: Solve for x
   x = 5,072,397.20/2,381.72
6. Step 6: Final answer
   x = 2,129.72