Finding the Third Proportional to 8,636.25 and 12,670.88

Step by Step Solution

1. Step 1: Write the proportion equation
   8,636.25 : 12,670.88 = 12,670.88 : x
2. Step 2: Convert to fraction form
   8,636.25/12,670.88 = 12,670.88/x
3. Step 3: Cross multiply
   8,636.25x = 12,670.88 × 12,670.88
4. Step 4: Simplify right side
   8,636.25x = 160,551,073.27
5. Step 5: Solve for x
   x = 160,551,073.27/8,636.25
6. Step 6: Final answer
   x = 18,590.37