Finding the Fourth Proportional to 21,949.37, 30,290.32 and 12,518.54

Step by Step Solution

1. Step 1: Write the proportion equation
   21,949.37 : 30,290.32 = 12,518.54 : x
2. Step 2: Convert to fraction form
   21,949.37/30,290.32 = 12,518.54/x
3. Step 3: Cross multiply
   21,949.37x = 30,290.32 × 12,518.54
4. Step 4: Simplify right side
   21,949.37x = 379,190,582.53
5. Step 5: Solve for x
   x = 379,190,582.53/21,949.37
6. Step 6: Final answer
   x = 17,275.69