Finding the Third Proportional to 21,312 and 38,016

Step by Step Solution

1. Step 1: Write the proportion equation
   21,312 : 38,016 = 38,016 : x
2. Step 2: Convert to fraction form
   21,312/38,016 = 38,016/x
3. Step 3: Cross multiply
   21,312x = 38,016 × 38,016
4. Step 4: Simplify right side
   21,312x = 1,445,216,256
5. Step 5: Solve for x
   x = 1,445,216,256/21,312
6. Step 6: Final answer
   x = 67,812.32