Finding the Third Proportional to 8,209.48 and 12,737.57

Step by Step Solution

1. Step 1: Write the proportion equation
   8,209.48 : 12,737.57 = 12,737.57 : x
2. Step 2: Convert to fraction form
   8,209.48/12,737.57 = 12,737.57/x
3. Step 3: Cross multiply
   8,209.48x = 12,737.57 × 12,737.57
4. Step 4: Simplify right side
   8,209.48x = 162,245,597.95
5. Step 5: Solve for x
   x = 162,245,597.95/8,209.48
6. Step 6: Final answer
   x = 19,763.21