Finding the Fourth Proportional to 23,128.27, 31,913.59 and 13,564.54

Step by Step Solution

1. Step 1: Write the proportion equation
   23,128.27 : 31,913.59 = 13,564.54 : x
2. Step 2: Convert to fraction form
   23,128.27/31,913.59 = 13,564.54/x
3. Step 3: Cross multiply
   23,128.27x = 31,913.59 × 13,564.54
4. Step 4: Simplify right side
   23,128.27x = 432,893,168.10
5. Step 5: Solve for x
   x = 432,893,168.10/23,128.27
6. Step 6: Final answer
   x = 18,717.06