Finding the Fourth Proportional to 18,540.18, 25,585.47 and 10,156.50

Step by Step Solution

1. Step 1: Write the proportion equation
   18,540.18 : 25,585.47 = 10,156.50 : x
2. Step 2: Convert to fraction form
   18,540.18/25,585.47 = 10,156.50/x
3. Step 3: Cross multiply
   18,540.18x = 25,585.47 × 10,156.50
4. Step 4: Simplify right side
   18,540.18x = 259,858,826.06
5. Step 5: Solve for x
   x = 259,858,826.06/18,540.18
6. Step 6: Final answer
   x = 14,015.98