Finding the Third Proportional to 8,630.72 and 18,908.86

Step by Step Solution

1. Step 1: Write the proportion equation
   8,630.72 : 18,908.86 = 18,908.86 : x
2. Step 2: Convert to fraction form
   8,630.72/18,908.86 = 18,908.86/x
3. Step 3: Cross multiply
   8,630.72x = 18,908.86 × 18,908.86
4. Step 4: Simplify right side
   8,630.72x = 357,544,962.86
5. Step 5: Solve for x
   x = 357,544,962.86/8,630.72
6. Step 6: Final answer
   x = 41,427.02