Finding the Third Proportional to 3,996.56 and 8,708.63

Step by Step Solution

1. Step 1: Write the proportion equation
   3,996.56 : 8,708.63 = 8,708.63 : x
2. Step 2: Convert to fraction form
   3,996.56/8,708.63 = 8,708.63/x
3. Step 3: Cross multiply
   3,996.56x = 8,708.63 × 8,708.63
4. Step 4: Simplify right side
   3,996.56x = 75,840,149.39
5. Step 5: Solve for x
   x = 75,840,149.39/3,996.56
6. Step 6: Final answer
   x = 18,976.35