Finding the Fourth Proportional to 11,443.26, 17,133.68 and 8,661.50

Step by Step Solution

1. Step 1: Write the proportion equation
   11,443.26 : 17,133.68 = 8,661.50 : x
2. Step 2: Convert to fraction form
   11,443.26/17,133.68 = 8,661.50/x
3. Step 3: Cross multiply
   11,443.26x = 17,133.68 × 8,661.50
4. Step 4: Simplify right side
   11,443.26x = 148,403,369.32
5. Step 5: Solve for x
   x = 148,403,369.32/11,443.26
6. Step 6: Final answer
   x = 12,968.63