Finding the Fourth Proportional to 8,481.81, 12,707.46 and 7,981.62

Step by Step Solution

1. Step 1: Write the proportion equation
   8,481.81 : 12,707.46 = 7,981.62 : x
2. Step 2: Convert to fraction form
   8,481.81/12,707.46 = 7,981.62/x
3. Step 3: Cross multiply
   8,481.81x = 12,707.46 × 7,981.62
4. Step 4: Simplify right side
   8,481.81x = 101,426,116.89
5. Step 5: Solve for x
   x = 101,426,116.89/8,481.81
6. Step 6: Final answer
   x = 11,958.07