Finding the Fourth Proportional to 18,039.78, 27,061.14 and 5,559.81

Step by Step Solution

1. Step 1: Write the proportion equation
   18,039.78 : 27,061.14 = 5,559.81 : x
2. Step 2: Convert to fraction form
   18,039.78/27,061.14 = 5,559.81/x
3. Step 3: Cross multiply
   18,039.78x = 27,061.14 × 5,559.81
4. Step 4: Simplify right side
   18,039.78x = 150,454,796.78
5. Step 5: Solve for x
   x = 150,454,796.78/18,039.78
6. Step 6: Final answer
   x = 8,340.17