Finding the Fourth Proportional to 18,456.38, 25,469.72 and 10,072.88

Step by Step Solution

1. Step 1: Write the proportion equation
   18,456.38 : 25,469.72 = 10,072.88 : x
2. Step 2: Convert to fraction form
   18,456.38/25,469.72 = 10,072.88/x
3. Step 3: Cross multiply
   18,456.38x = 25,469.72 × 10,072.88
4. Step 4: Simplify right side
   18,456.38x = 256,553,433.19
5. Step 5: Solve for x
   x = 256,553,433.19/18,456.38
6. Step 6: Final answer
   x = 13,900.53