Finding the Fourth Proportional to 18,603.64, 25,673 and 10,105.72

Step by Step Solution

1. Step 1: Write the proportion equation
   18,603.64 : 25,673 = 10,105.72 : x
2. Step 2: Convert to fraction form
   18,603.64/25,673 = 10,105.72/x
3. Step 3: Cross multiply
   18,603.64x = 25,673 × 10,105.72
4. Step 4: Simplify right side
   18,603.64x = 259,444,149.56
5. Step 5: Solve for x
   x = 259,444,149.56/18,603.64
6. Step 6: Final answer
   x = 13,945.88