Finding the Fourth Proportional to 18,498.50, 25,528.56 and 10,115.54

Step by Step Solution

1. Step 1: Write the proportion equation
   18,498.50 : 25,528.56 = 10,115.54 : x
2. Step 2: Convert to fraction form
   18,498.50/25,528.56 = 10,115.54/x
3. Step 3: Cross multiply
   18,498.50x = 25,528.56 × 10,115.54
4. Step 4: Simplify right side
   18,498.50x = 258,235,169.82
5. Step 5: Solve for x
   x = 258,235,169.82/18,498.50
6. Step 6: Final answer
   x = 13,959.79