Finding the Third Proportional to 6,988 and 12,920

Step by Step Solution

1. Step 1: Write the proportion equation
   6,988 : 12,920 = 12,920 : x
2. Step 2: Convert to fraction form
   6,988/12,920 = 12,920/x
3. Step 3: Cross multiply
   6,988x = 12,920 × 12,920
4. Step 4: Simplify right side
   6,988x = 166,926,400
5. Step 5: Solve for x
   x = 166,926,400/6,988
6. Step 6: Final answer
   x = 23,887.58