Finding the Fourth Proportional to 10,161.82, 15,231.61 and 5,231.73

Step by Step Solution

1. Step 1: Write the proportion equation
   10,161.82 : 15,231.61 = 5,231.73 : x
2. Step 2: Convert to fraction form
   10,161.82/15,231.61 = 5,231.73/x
3. Step 3: Cross multiply
   10,161.82x = 15,231.61 × 5,231.73
4. Step 4: Simplify right side
   10,161.82x = 79,687,644.83
5. Step 5: Solve for x
   x = 79,687,644.83/10,161.82
6. Step 6: Final answer
   x = 7,841.87