Finding the Fourth Proportional to 21,863.34, 30,175.47 and 12,431.34

Step by Step Solution

1. Step 1: Write the proportion equation
   21,863.34 : 30,175.47 = 12,431.34 : x
2. Step 2: Convert to fraction form
   21,863.34/30,175.47 = 12,431.34/x
3. Step 3: Cross multiply
   21,863.34x = 30,175.47 × 12,431.34
4. Step 4: Simplify right side
   21,863.34x = 375,121,527.23
5. Step 5: Solve for x
   x = 375,121,527.23/21,863.34
6. Step 6: Final answer
   x = 17,157.56