Finding the Fourth Proportional to 22,696.22, 31,320.78 and 12,760.22

Step by Step Solution

1. Step 1: Write the proportion equation
   22,696.22 : 31,320.78 = 12,760.22 : x
2. Step 2: Convert to fraction form
   22,696.22/31,320.78 = 12,760.22/x
3. Step 3: Cross multiply
   22,696.22x = 31,320.78 × 12,760.22
4. Step 4: Simplify right side
   22,696.22x = 399,660,043.37
5. Step 5: Solve for x
   x = 399,660,043.37/22,696.22
6. Step 6: Final answer
   x = 17,609.10