Finding the Fourth Proportional to 18,385.41, 27,553.89 and 7,286.05

Step by Step Solution

1. Step 1: Write the proportion equation
   18,385.41 : 27,553.89 = 7,286.05 : x
2. Step 2: Convert to fraction form
   18,385.41/27,553.89 = 7,286.05/x
3. Step 3: Cross multiply
   18,385.41x = 27,553.89 × 7,286.05
4. Step 4: Simplify right side
   18,385.41x = 200,758,846.03
5. Step 5: Solve for x
   x = 200,758,846.03/18,385.41
6. Step 6: Final answer
   x = 10,919.47