Finding the Fourth Proportional to 10,993.89, 15,171.49 and 5,958.12

Step by Step Solution

1. Step 1: Write the proportion equation
   10,993.89 : 15,171.49 = 5,958.12 : x
2. Step 2: Convert to fraction form
   10,993.89/15,171.49 = 5,958.12/x
3. Step 3: Cross multiply
   10,993.89x = 15,171.49 × 5,958.12
4. Step 4: Simplify right side
   10,993.89x = 90,393,528.21
5. Step 5: Solve for x
   x = 90,393,528.21/10,993.89
6. Step 6: Final answer
   x = 8,222.16