Finding the Third Proportional to 8,730 and 13,680

Step by Step Solution

1. Step 1: Write the proportion equation
   8,730 : 13,680 = 13,680 : x
2. Step 2: Convert to fraction form
   8,730/13,680 = 13,680/x
3. Step 3: Cross multiply
   8,730x = 13,680 × 13,680
4. Step 4: Simplify right side
   8,730x = 187,142,400
5. Step 5: Solve for x
   x = 187,142,400/8,730
6. Step 6: Final answer
   x = 21,436.70