Finding the Third Proportional to 13,429.97 and 20,728.69

Step by Step Solution

1. Step 1: Write the proportion equation
   13,429.97 : 20,728.69 = 20,728.69 : x
2. Step 2: Convert to fraction form
   13,429.97/20,728.69 = 20,728.69/x
3. Step 3: Cross multiply
   13,429.97x = 20,728.69 × 20,728.69
4. Step 4: Simplify right side
   13,429.97x = 429,678,485.47
5. Step 5: Solve for x
   x = 429,678,485.47/13,429.97
6. Step 6: Final answer
   x = 31,994.00