Finding the Fourth Proportional to 12,189.33, 18,277.16 and 3,867.80

Step by Step Solution

1. Step 1: Write the proportion equation
   12,189.33 : 18,277.16 = 3,867.80 : x
2. Step 2: Convert to fraction form
   12,189.33/18,277.16 = 3,867.80/x
3. Step 3: Cross multiply
   12,189.33x = 18,277.16 × 3,867.80
4. Step 4: Simplify right side
   12,189.33x = 70,692,288.72
5. Step 5: Solve for x
   x = 70,692,288.72/12,189.33
6. Step 6: Final answer
   x = 5,799.52