Finding the Third Proportional to 9,672 and 21,216

Step by Step Solution

1. Step 1: Write the proportion equation
   9,672 : 21,216 = 21,216 : x
2. Step 2: Convert to fraction form
   9,672/21,216 = 21,216/x
3. Step 3: Cross multiply
   9,672x = 21,216 × 21,216
4. Step 4: Simplify right side
   9,672x = 450,118,656
5. Step 5: Solve for x
   x = 450,118,656/9,672
6. Step 6: Final answer
   x = 46,538.32