Finding the Fourth Proportional to 18,538.10, 25,580.96 and 10,983.15

Step by Step Solution

1. Step 1: Write the proportion equation
   18,538.10 : 25,580.96 = 10,983.15 : x
2. Step 2: Convert to fraction form
   18,538.10/25,580.96 = 10,983.15/x
3. Step 3: Cross multiply
   18,538.10x = 25,580.96 × 10,983.15
4. Step 4: Simplify right side
   18,538.10x = 280,959,520.82
5. Step 5: Solve for x
   x = 280,959,520.82/18,538.10
6. Step 6: Final answer
   x = 15,155.79