Finding the Fourth Proportional to 21,815.39, 30,095.75 and 13,744.15

Step by Step Solution

1. Step 1: Write the proportion equation
   21,815.39 : 30,095.75 = 13,744.15 : x
2. Step 2: Convert to fraction form
   21,815.39/30,095.75 = 13,744.15/x
3. Step 3: Cross multiply
   21,815.39x = 30,095.75 × 13,744.15
4. Step 4: Simplify right side
   21,815.39x = 413,640,461.48
5. Step 5: Solve for x
   x = 413,640,461.48/21,815.39
6. Step 6: Final answer
   x = 18,960.95