Finding the Fourth Proportional to 22,696.38, 31,317.39 and 12,624.80

Step by Step Solution

1. Step 1: Write the proportion equation
   22,696.38 : 31,317.39 = 12,624.80 : x
2. Step 2: Convert to fraction form
   22,696.38/31,317.39 = 12,624.80/x
3. Step 3: Cross multiply
   22,696.38x = 31,317.39 × 12,624.80
4. Step 4: Simplify right side
   22,696.38x = 395,375,628.69
5. Step 5: Solve for x
   x = 395,375,628.69/22,696.38
6. Step 6: Final answer
   x = 17,420.21