Finding the Fourth Proportional to 23,105.21, 31,883.71 and 13,168.57

Step by Step Solution

1. Step 1: Write the proportion equation
   23,105.21 : 31,883.71 = 13,168.57 : x
2. Step 2: Convert to fraction form
   23,105.21/31,883.71 = 13,168.57/x
3. Step 3: Cross multiply
   23,105.21x = 31,883.71 × 13,168.57
4. Step 4: Simplify right side
   23,105.21x = 419,862,801.15
5. Step 5: Solve for x
   x = 419,862,801.15/23,105.21
6. Step 6: Final answer
   x = 18,171.78