Finding the Fourth Proportional to 18,404.56, 25,399.31 and 10,855.31

Step by Step Solution

1. Step 1: Write the proportion equation
   18,404.56 : 25,399.31 = 10,855.31 : x
2. Step 2: Convert to fraction form
   18,404.56/25,399.31 = 10,855.31/x
3. Step 3: Cross multiply
   18,404.56x = 25,399.31 × 10,855.31
4. Step 4: Simplify right side
   18,404.56x = 275,717,393.06
5. Step 5: Solve for x
   x = 275,717,393.06/18,404.56
6. Step 6: Final answer
   x = 14,980.93