Finding the Fourth Proportional to 18,540.56, 25,585.83 and 10,042.49

Step by Step Solution

1. Step 1: Write the proportion equation
   18,540.56 : 25,585.83 = 10,042.49 : x
2. Step 2: Convert to fraction form
   18,540.56/25,585.83 = 10,042.49/x
3. Step 3: Cross multiply
   18,540.56x = 25,585.83 × 10,042.49
4. Step 4: Simplify right side
   18,540.56x = 256,945,441.92
5. Step 5: Solve for x
   x = 256,945,441.92/18,540.56
6. Step 6: Final answer
   x = 13,858.56