Finding the Fourth Proportional to 18,608.72, 25,680.24 and 10,225.28

Step by Step Solution

1. Step 1: Write the proportion equation
   18,608.72 : 25,680.24 = 10,225.28 : x
2. Step 2: Convert to fraction form
   18,608.72/25,680.24 = 10,225.28/x
3. Step 3: Cross multiply
   18,608.72x = 25,680.24 × 10,225.28
4. Step 4: Simplify right side
   18,608.72x = 262,587,644.47
5. Step 5: Solve for x
   x = 262,587,644.47/18,608.72
6. Step 6: Final answer
   x = 14,111.00