Finding the Fourth Proportional to 21,923.91, 30,242.95 and 12,969.69

Step by Step Solution

1. Step 1: Write the proportion equation
   21,923.91 : 30,242.95 = 12,969.69 : x
2. Step 2: Convert to fraction form
   21,923.91/30,242.95 = 12,969.69/x
3. Step 3: Cross multiply
   21,923.91x = 30,242.95 × 12,969.69
4. Step 4: Simplify right side
   21,923.91x = 392,241,540.35
5. Step 5: Solve for x
   x = 392,241,540.35/21,923.91
6. Step 6: Final answer
   x = 17,891.04