Finding the Fourth Proportional to 22,626.38, 31,223 and 13,668.60

Step by Step Solution

1. Step 1: Write the proportion equation
   22,626.38 : 31,223 = 13,668.60 : x
2. Step 2: Convert to fraction form
   22,626.38/31,223 = 13,668.60/x
3. Step 3: Cross multiply
   22,626.38x = 31,223 × 13,668.60
4. Step 4: Simplify right side
   22,626.38x = 426,774,697.80
5. Step 5: Solve for x
   x = 426,774,697.80/22,626.38
6. Step 6: Final answer
   x = 18,861.82