Finding the Fourth Proportional to 5,871.80, 8,105.30 and 3,885.08

Step by Step Solution

1. Step 1: Write the proportion equation
   5,871.80 : 8,105.30 = 3,885.08 : x
2. Step 2: Convert to fraction form
   5,871.80/8,105.30 = 3,885.08/x
3. Step 3: Cross multiply
   5,871.80x = 8,105.30 × 3,885.08
4. Step 4: Simplify right side
   5,871.80x = 31,489,738.92
5. Step 5: Solve for x
   x = 31,489,738.92/5,871.80
6. Step 6: Final answer
   x = 5,362.88