Finding the Fourth Proportional to 10,081.89, 15,121.68 and 2,686.17

Step by Step Solution

1. Step 1: Write the proportion equation
   10,081.89 : 15,121.68 = 2,686.17 : x
2. Step 2: Convert to fraction form
   10,081.89/15,121.68 = 2,686.17/x
3. Step 3: Cross multiply
   10,081.89x = 15,121.68 × 2,686.17
4. Step 4: Simplify right side
   10,081.89x = 40,619,403.17
5. Step 5: Solve for x
   x = 40,619,403.17/10,081.89
6. Step 6: Final answer
   x = 4,028.95