Finding the Fourth Proportional to 15,320.54, 21,142.42 and 8,608.48

Step by Step Solution

1. Step 1: Write the proportion equation
   15,320.54 : 21,142.42 = 8,608.48 : x
2. Step 2: Convert to fraction form
   15,320.54/21,142.42 = 8,608.48/x
3. Step 3: Cross multiply
   15,320.54x = 21,142.42 × 8,608.48
4. Step 4: Simplify right side
   15,320.54x = 182,004,025.34
5. Step 5: Solve for x
   x = 182,004,025.34/15,320.54
6. Step 6: Final answer
   x = 11,879.74