Finding the Third Proportional to 4,109.48 and 8,731.55

Step by Step Solution

1. Step 1: Write the proportion equation
   4,109.48 : 8,731.55 = 8,731.55 : x
2. Step 2: Convert to fraction form
   4,109.48/8,731.55 = 8,731.55/x
3. Step 3: Cross multiply
   4,109.48x = 8,731.55 × 8,731.55
4. Step 4: Simplify right side
   4,109.48x = 76,239,910.83
5. Step 5: Solve for x
   x = 76,239,910.83/4,109.48
6. Step 6: Final answer
   x = 18,552.18