Finding the Fourth Proportional to 11,010.56, 16,591.60 and 9,105.60

Step by Step Solution

1. Step 1: Write the proportion equation
   11,010.56 : 16,591.60 = 9,105.60 : x
2. Step 2: Convert to fraction form
   11,010.56/16,591.60 = 9,105.60/x
3. Step 3: Cross multiply
   11,010.56x = 16,591.60 × 9,105.60
4. Step 4: Simplify right side
   11,010.56x = 151,076,472.96
5. Step 5: Solve for x
   x = 151,076,472.96/11,010.56
6. Step 6: Final answer
   x = 13,721.05