Finding the Third Proportional to 19,620 and 38,256

Step by Step Solution

1. Step 1: Write the proportion equation
   19,620 : 38,256 = 38,256 : x
2. Step 2: Convert to fraction form
   19,620/38,256 = 38,256/x
3. Step 3: Cross multiply
   19,620x = 38,256 × 38,256
4. Step 4: Simplify right side
   19,620x = 1,463,521,536
5. Step 5: Solve for x
   x = 1,463,521,536/19,620
6. Step 6: Final answer
   x = 74,593.35