Finding the Third Proportional to 11,312 and 13,680

Step by Step Solution

1. Step 1: Write the proportion equation
   11,312 : 13,680 = 13,680 : x
2. Step 2: Convert to fraction form
   11,312/13,680 = 13,680/x
3. Step 3: Cross multiply
   11,312x = 13,680 × 13,680
4. Step 4: Simplify right side
   11,312x = 187,142,400
5. Step 5: Solve for x
   x = 187,142,400/11,312
6. Step 6: Final answer
   x = 16,543.71