Finding the Fourth Proportional to 21,956.47, 30,297.37 and 12,395.86

Step by Step Solution

1. Step 1: Write the proportion equation
   21,956.47 : 30,297.37 = 12,395.86 : x
2. Step 2: Convert to fraction form
   21,956.47/30,297.37 = 12,395.86/x
3. Step 3: Cross multiply
   21,956.47x = 30,297.37 × 12,395.86
4. Step 4: Simplify right side
   21,956.47x = 375,561,956.89
5. Step 5: Solve for x
   x = 375,561,956.89/21,956.47
6. Step 6: Final answer
   x = 17,104.84