Finding the Fourth Proportional to 18,253.39, 27,384.49 and 5,105.57

Step by Step Solution

1. Step 1: Write the proportion equation
   18,253.39 : 27,384.49 = 5,105.57 : x
2. Step 2: Convert to fraction form
   18,253.39/27,384.49 = 5,105.57/x
3. Step 3: Cross multiply
   18,253.39x = 27,384.49 × 5,105.57
4. Step 4: Simplify right side
   18,253.39x = 139,813,505.45
5. Step 5: Solve for x
   x = 139,813,505.45/18,253.39
6. Step 6: Final answer
   x = 7,659.59