Finding the Fourth Proportional to 11,055.21, 16,560.61 and 5,491.73

Step by Step Solution

1. Step 1: Write the proportion equation
   11,055.21 : 16,560.61 = 5,491.73 : x
2. Step 2: Convert to fraction form
   11,055.21/16,560.61 = 5,491.73/x
3. Step 3: Cross multiply
   11,055.21x = 16,560.61 × 5,491.73
4. Step 4: Simplify right side
   11,055.21x = 90,946,398.76
5. Step 5: Solve for x
   x = 90,946,398.76/11,055.21
6. Step 6: Final answer
   x = 8,226.56