Finding the Fourth Proportional to 18,456.05, 27,685.43 and 5,308.54

Step by Step Solution

1. Step 1: Write the proportion equation
   18,456.05 : 27,685.43 = 5,308.54 : x
2. Step 2: Convert to fraction form
   18,456.05/27,685.43 = 5,308.54/x
3. Step 3: Cross multiply
   18,456.05x = 27,685.43 × 5,308.54
4. Step 4: Simplify right side
   18,456.05x = 146,969,212.57
5. Step 5: Solve for x
   x = 146,969,212.57/18,456.05
6. Step 6: Final answer
   x = 7,963.20