Finding the Third Proportional to 15,672 and 18,456

Step by Step Solution

1. Step 1: Write the proportion equation
   15,672 : 18,456 = 18,456 : x
2. Step 2: Convert to fraction form
   15,672/18,456 = 18,456/x
3. Step 3: Cross multiply
   15,672x = 18,456 × 18,456
4. Step 4: Simplify right side
   15,672x = 340,623,936
5. Step 5: Solve for x
   x = 340,623,936/15,672
6. Step 6: Final answer
   x = 21,734.55