Finding the Fourth Proportional to 3,871.50, 5,342.69 and 2,103.11

Step by Step Solution

1. Step 1: Write the proportion equation
   3,871.50 : 5,342.69 = 2,103.11 : x
2. Step 2: Convert to fraction form
   3,871.50/5,342.69 = 2,103.11/x
3. Step 3: Cross multiply
   3,871.50x = 5,342.69 × 2,103.11
4. Step 4: Simplify right side
   3,871.50x = 11,236,293.40
5. Step 5: Solve for x
   x = 11,236,293.40/3,871.50
6. Step 6: Final answer
   x = 2,902.31