Finding the Fourth Proportional to 9,105.40, 13,641.90 and 8,563.24

Step by Step Solution

1. Step 1: Write the proportion equation
   9,105.40 : 13,641.90 = 8,563.24 : x
2. Step 2: Convert to fraction form
   9,105.40/13,641.90 = 8,563.24/x
3. Step 3: Cross multiply
   9,105.40x = 13,641.90 × 8,563.24
4. Step 4: Simplify right side
   9,105.40x = 116,818,863.76
5. Step 5: Solve for x
   x = 116,818,863.76/9,105.40
6. Step 6: Final answer
   x = 12,829.62