Finding the Fourth Proportional to 3,871.54, 5,342.72 and 2,103.18

Step by Step Solution

1. Step 1: Write the proportion equation
   3,871.54 : 5,342.72 = 2,103.18 : x
2. Step 2: Convert to fraction form
   3,871.54/5,342.72 = 2,103.18/x
3. Step 3: Cross multiply
   3,871.54x = 5,342.72 × 2,103.18
4. Step 4: Simplify right side
   3,871.54x = 11,236,691.33
5. Step 5: Solve for x
   x = 11,236,691.33/3,871.54
6. Step 6: Final answer
   x = 2,902.39