Finding the Fourth Proportional to 18,099.78, 27,139.89 and 5,614.50

Step by Step Solution

1. Step 1: Write the proportion equation
   18,099.78 : 27,139.89 = 5,614.50 : x
2. Step 2: Convert to fraction form
   18,099.78/27,139.89 = 5,614.50/x
3. Step 3: Cross multiply
   18,099.78x = 27,139.89 × 5,614.50
4. Step 4: Simplify right side
   18,099.78x = 152,376,912.41
5. Step 5: Solve for x
   x = 152,376,912.41/18,099.78
6. Step 6: Final answer
   x = 8,418.72