Finding the Fourth Proportional to 23,007.21, 31,751.07 and 12,938.82

Step by Step Solution

1. Step 1: Write the proportion equation
   23,007.21 : 31,751.07 = 12,938.82 : x
2. Step 2: Convert to fraction form
   23,007.21/31,751.07 = 12,938.82/x
3. Step 3: Cross multiply
   23,007.21x = 31,751.07 × 12,938.82
4. Step 4: Simplify right side
   23,007.21x = 410,821,379.54
5. Step 5: Solve for x
   x = 410,821,379.54/23,007.21
6. Step 6: Final answer
   x = 17,856.20