Finding the Fourth Proportional to 18,173.69, 25,078.73 and 10,215.39

Step by Step Solution

1. Step 1: Write the proportion equation
   18,173.69 : 25,078.73 = 10,215.39 : x
2. Step 2: Convert to fraction form
   18,173.69/25,078.73 = 10,215.39/x
3. Step 3: Cross multiply
   18,173.69x = 25,078.73 × 10,215.39
4. Step 4: Simplify right side
   18,173.69x = 256,188,956.58
5. Step 5: Solve for x
   x = 256,188,956.58/18,173.69
6. Step 6: Final answer
   x = 14,096.70