Finding the Fourth Proportional to 23,002.81, 31,743.16 and 12,931.67

Step by Step Solution

1. Step 1: Write the proportion equation
   23,002.81 : 31,743.16 = 12,931.67 : x
2. Step 2: Convert to fraction form
   23,002.81/31,743.16 = 12,931.67/x
3. Step 3: Cross multiply
   23,002.81x = 31,743.16 × 12,931.67
4. Step 4: Simplify right side
   23,002.81x = 410,492,116.91
5. Step 5: Solve for x
   x = 410,492,116.91/23,002.81
6. Step 6: Final answer
   x = 17,845.31