Finding the Fourth Proportional to 3,871.91, 5,343.22 and 2,103.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,871.91 : 5,343.22 = 2,103.50 : x
2. Step 2: Convert to fraction form
   3,871.91/5,343.22 = 2,103.50/x
3. Step 3: Cross multiply
   3,871.91x = 5,343.22 × 2,103.50
4. Step 4: Simplify right side
   3,871.91x = 11,239,436.55
5. Step 5: Solve for x
   x = 11,239,436.55/3,871.91
6. Step 6: Final answer
   x = 2,902.82