Finding the Fourth Proportional to 18,568.77, 27,855.71 and 5,419.23

Step by Step Solution

1. Step 1: Write the proportion equation
   18,568.77 : 27,855.71 = 5,419.23 : x
2. Step 2: Convert to fraction form
   18,568.77/27,855.71 = 5,419.23/x
3. Step 3: Cross multiply
   18,568.77x = 27,855.71 × 5,419.23
4. Step 4: Simplify right side
   18,568.77x = 150,956,499.30
5. Step 5: Solve for x
   x = 150,956,499.30/18,568.77
6. Step 6: Final answer
   x = 8,129.59