Finding the Third Proportional to 7,988 and 12,760

Step by Step Solution

1. Step 1: Write the proportion equation
   7,988 : 12,760 = 12,760 : x
2. Step 2: Convert to fraction form
   7,988/12,760 = 12,760/x
3. Step 3: Cross multiply
   7,988x = 12,760 × 12,760
4. Step 4: Simplify right side
   7,988x = 162,817,600
5. Step 5: Solve for x
   x = 162,817,600/7,988
6. Step 6: Final answer
   x = 20,382.77