Finding the Third Proportional to 13,678.88 and 20,736

Step by Step Solution

1. Step 1: Write the proportion equation
   13,678.88 : 20,736 = 20,736 : x
2. Step 2: Convert to fraction form
   13,678.88/20,736 = 20,736/x
3. Step 3: Cross multiply
   13,678.88x = 20,736 × 20,736
4. Step 4: Simplify right side
   13,678.88x = 429,981,696
5. Step 5: Solve for x
   x = 429,981,696/13,678.88
6. Step 6: Final answer
   x = 31,434.00