Finding the Fourth Proportional to 22,696.50, 31,321.17 and 12,760.50

Step by Step Solution

1. Step 1: Write the proportion equation
   22,696.50 : 31,321.17 = 12,760.50 : x
2. Step 2: Convert to fraction form
   22,696.50/31,321.17 = 12,760.50/x
3. Step 3: Cross multiply
   22,696.50x = 31,321.17 × 12,760.50
4. Step 4: Simplify right side
   22,696.50x = 399,673,789.79
5. Step 5: Solve for x
   x = 399,673,789.79/22,696.50
6. Step 6: Final answer
   x = 17,609.49