Finding the Fourth Proportional to 18,087.37, 27,136.82 and 8,603.69

Step by Step Solution

1. Step 1: Write the proportion equation
   18,087.37 : 27,136.82 = 8,603.69 : x
2. Step 2: Convert to fraction form
   18,087.37/27,136.82 = 8,603.69/x
3. Step 3: Cross multiply
   18,087.37x = 27,136.82 × 8,603.69
4. Step 4: Simplify right side
   18,087.37x = 233,476,672.69
5. Step 5: Solve for x
   x = 233,476,672.69/18,087.37
6. Step 6: Final answer
   x = 12,908.27