Finding the Fourth Proportional to 16,640.79, 22,964.28 and 9,087.15

Step by Step Solution

1. Step 1: Write the proportion equation
   16,640.79 : 22,964.28 = 9,087.15 : x
2. Step 2: Convert to fraction form
   16,640.79/22,964.28 = 9,087.15/x
3. Step 3: Cross multiply
   16,640.79x = 22,964.28 × 9,087.15
4. Step 4: Simplify right side
   16,640.79x = 208,679,857.00
5. Step 5: Solve for x
   x = 208,679,857.00/16,640.79
6. Step 6: Final answer
   x = 12,540.26