Finding the Fourth Proportional to 18,499.78, 25,529.67 and 10,116.28

Step by Step Solution

1. Step 1: Write the proportion equation
   18,499.78 : 25,529.67 = 10,116.28 : x
2. Step 2: Convert to fraction form
   18,499.78/25,529.67 = 10,116.28/x
3. Step 3: Cross multiply
   18,499.78x = 25,529.67 × 10,116.28
4. Step 4: Simplify right side
   18,499.78x = 258,265,290.03
5. Step 5: Solve for x
   x = 258,265,290.03/18,499.78
6. Step 6: Final answer
   x = 13,960.45