Finding the Fourth Proportional to 18,609.06, 25,680.56 and 10,111.12

Step by Step Solution

1. Step 1: Write the proportion equation
   18,609.06 : 25,680.56 = 10,111.12 : x
2. Step 2: Convert to fraction form
   18,609.06/25,680.56 = 10,111.12/x
3. Step 3: Cross multiply
   18,609.06x = 25,680.56 × 10,111.12
4. Step 4: Simplify right side
   18,609.06x = 259,659,223.83
5. Step 5: Solve for x
   x = 259,659,223.83/18,609.06
6. Step 6: Final answer
   x = 13,953.38