Finding the Fourth Proportional to 10,991.27, 15,167.98 and 5,955.55

Step by Step Solution

1. Step 1: Write the proportion equation
   10,991.27 : 15,167.98 = 5,955.55 : x
2. Step 2: Convert to fraction form
   10,991.27/15,167.98 = 5,955.55/x
3. Step 3: Cross multiply
   10,991.27x = 15,167.98 × 5,955.55
4. Step 4: Simplify right side
   10,991.27x = 90,333,692.22
5. Step 5: Solve for x
   x = 90,333,692.22/10,991.27
6. Step 6: Final answer
   x = 8,218.68