Finding the Fourth Proportional to 23,005.43, 31,745.70 and 12,931.92

Step by Step Solution

1. Step 1: Write the proportion equation
   23,005.43 : 31,745.70 = 12,931.92 : x
2. Step 2: Convert to fraction form
   23,005.43/31,745.70 = 12,931.92/x
3. Step 3: Cross multiply
   23,005.43x = 31,745.70 × 12,931.92
4. Step 4: Simplify right side
   23,005.43x = 410,532,852.74
5. Step 5: Solve for x
   x = 410,532,852.74/23,005.43
6. Step 6: Final answer
   x = 17,845.04