Finding the Fourth Proportional to 18,615.71, 25,689.83 and 10,117.83

Step by Step Solution

1. Step 1: Write the proportion equation
   18,615.71 : 25,689.83 = 10,117.83 : x
2. Step 2: Convert to fraction form
   18,615.71/25,689.83 = 10,117.83/x
3. Step 3: Cross multiply
   18,615.71x = 25,689.83 × 10,117.83
4. Step 4: Simplify right side
   18,615.71x = 259,925,378.42
5. Step 5: Solve for x
   x = 259,925,378.42/18,615.71
6. Step 6: Final answer
   x = 13,962.69