Finding the Fourth Proportional to 18,006.72, 24,850.56 and 12,408

Step by Step Solution

1. Step 1: Write the proportion equation
   18,006.72 : 24,850.56 = 12,408 : x
2. Step 2: Convert to fraction form
   18,006.72/24,850.56 = 12,408/x
3. Step 3: Cross multiply
   18,006.72x = 24,850.56 × 12,408
4. Step 4: Simplify right side
   18,006.72x = 308,345,748.48
5. Step 5: Solve for x
   x = 308,345,748.48/18,006.72
6. Step 6: Final answer
   x = 17,123.93