Finding the Fourth Proportional to 13,105.50, 19,661.58 and 3,871.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,105.50 : 19,661.58 = 3,871.50 : x
2. Step 2: Convert to fraction form
   13,105.50/19,661.58 = 3,871.50/x
3. Step 3: Cross multiply
   13,105.50x = 19,661.58 × 3,871.50
4. Step 4: Simplify right side
   13,105.50x = 76,119,806.97
5. Step 5: Solve for x
   x = 76,119,806.97/13,105.50
6. Step 6: Final answer
   x = 5,808.23