Finding the Third Proportional to 12,920 and 28,036

Step by Step Solution

1. Step 1: Write the proportion equation
   12,920 : 28,036 = 28,036 : x
2. Step 2: Convert to fraction form
   12,920/28,036 = 28,036/x
3. Step 3: Cross multiply
   12,920x = 28,036 × 28,036
4. Step 4: Simplify right side
   12,920x = 786,017,296
5. Step 5: Solve for x
   x = 786,017,296/12,920
6. Step 6: Final answer
   x = 60,837.25