Finding the Fourth Proportional to 12,188.21, 18,275.46 and 3,866.67

Step by Step Solution

1. Step 1: Write the proportion equation
   12,188.21 : 18,275.46 = 3,866.67 : x
2. Step 2: Convert to fraction form
   12,188.21/18,275.46 = 3,866.67/x
3. Step 3: Cross multiply
   12,188.21x = 18,275.46 × 3,866.67
4. Step 4: Simplify right side
   12,188.21x = 70,665,158.42
5. Step 5: Solve for x
   x = 70,665,158.42/12,188.21
6. Step 6: Final answer
   x = 5,797.83