Finding the Fourth Proportional to 10,939.80, 15,096.92 and 5,971.80

Step by Step Solution

1. Step 1: Write the proportion equation
   10,939.80 : 15,096.92 = 5,971.80 : x
2. Step 2: Convert to fraction form
   10,939.80/15,096.92 = 5,971.80/x
3. Step 3: Cross multiply
   10,939.80x = 15,096.92 × 5,971.80
4. Step 4: Simplify right side
   10,939.80x = 90,155,786.86
5. Step 5: Solve for x
   x = 90,155,786.86/10,939.80
6. Step 6: Final answer
   x = 8,241.08