Finding the Fourth Proportional to 11,469.50, 17,179.94 and 8,665.28

Step by Step Solution

1. Step 1: Write the proportion equation
   11,469.50 : 17,179.94 = 8,665.28 : x
2. Step 2: Convert to fraction form
   11,469.50/17,179.94 = 8,665.28/x
3. Step 3: Cross multiply
   11,469.50x = 17,179.94 × 8,665.28
4. Step 4: Simplify right side
   11,469.50x = 148,868,861.26
5. Step 5: Solve for x
   x = 148,868,861.26/11,469.50
6. Step 6: Final answer
   x = 12,979.55