Finding the Fourth Proportional to 10,991.81, 15,168.59 and 5,956.04

Step by Step Solution

1. Step 1: Write the proportion equation
   10,991.81 : 15,168.59 = 5,956.04 : x
2. Step 2: Convert to fraction form
   10,991.81/15,168.59 = 5,956.04/x
3. Step 3: Cross multiply
   10,991.81x = 15,168.59 × 5,956.04
4. Step 4: Simplify right side
   10,991.81x = 90,344,728.78
5. Step 5: Solve for x
   x = 90,344,728.78/10,991.81
6. Step 6: Final answer
   x = 8,219.28