Finding the Fourth Proportional to 12,208.72, 18,307.02 and 3,887.66

Step by Step Solution

1. Step 1: Write the proportion equation
   12,208.72 : 18,307.02 = 3,887.66 : x
2. Step 2: Convert to fraction form
   12,208.72/18,307.02 = 3,887.66/x
3. Step 3: Cross multiply
   12,208.72x = 18,307.02 × 3,887.66
4. Step 4: Simplify right side
   12,208.72x = 71,171,469.37
5. Step 5: Solve for x
   x = 71,171,469.37/12,208.72
6. Step 6: Final answer
   x = 5,829.56