Finding the Fourth Proportional to 18,499.08, 25,528.82 and 10,115.72

Step by Step Solution

1. Step 1: Write the proportion equation
   18,499.08 : 25,528.82 = 10,115.72 : x
2. Step 2: Convert to fraction form
   18,499.08/25,528.82 = 10,115.72/x
3. Step 3: Cross multiply
   18,499.08x = 25,528.82 × 10,115.72
4. Step 4: Simplify right side
   18,499.08x = 258,242,395.05
5. Step 5: Solve for x
   x = 258,242,395.05/18,499.08
6. Step 6: Final answer
   x = 13,959.74