Finding the Fourth Proportional to 10,991.51, 15,168.27 and 5,955.75

Step by Step Solution

1. Step 1: Write the proportion equation
   10,991.51 : 15,168.27 = 5,955.75 : x
2. Step 2: Convert to fraction form
   10,991.51/15,168.27 = 5,955.75/x
3. Step 3: Cross multiply
   10,991.51x = 15,168.27 × 5,955.75
4. Step 4: Simplify right side
   10,991.51x = 90,338,424.05
5. Step 5: Solve for x
   x = 90,338,424.05/10,991.51
6. Step 6: Final answer
   x = 8,218.93