Finding the Fourth Proportional to 12,185.98, 18,281.73 and 3,866.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,185.98 : 18,281.73 = 3,866.50 : x
2. Step 2: Convert to fraction form
   12,185.98/18,281.73 = 3,866.50/x
3. Step 3: Cross multiply
   12,185.98x = 18,281.73 × 3,866.50
4. Step 4: Simplify right side
   12,185.98x = 70,686,309.05
5. Step 5: Solve for x
   x = 70,686,309.05/12,185.98
6. Step 6: Final answer
   x = 5,800.63