Finding the Third Proportional to 13,683.09 and 20,800.69

Step by Step Solution

1. Step 1: Write the proportion equation
   13,683.09 : 20,800.69 = 20,800.69 : x
2. Step 2: Convert to fraction form
   13,683.09/20,800.69 = 20,800.69/x
3. Step 3: Cross multiply
   13,683.09x = 20,800.69 × 20,800.69
4. Step 4: Simplify right side
   13,683.09x = 432,668,600.47
5. Step 5: Solve for x
   x = 432,668,600.47/13,683.09
6. Step 6: Final answer
   x = 31,620.67