Finding the Third Proportional to 8,179.31 and 9,981.56

Step by Step Solution

1. Step 1: Write the proportion equation
   8,179.31 : 9,981.56 = 9,981.56 : x
2. Step 2: Convert to fraction form
   8,179.31/9,981.56 = 9,981.56/x
3. Step 3: Cross multiply
   8,179.31x = 9,981.56 × 9,981.56
4. Step 4: Simplify right side
   8,179.31x = 99,631,589.94
5. Step 5: Solve for x
   x = 99,631,589.94/8,179.31
6. Step 6: Final answer
   x = 12,180.92