Finding the Third Proportional to 12,636 and 28,080

Step by Step Solution

1. Step 1: Write the proportion equation
   12,636 : 28,080 = 28,080 : x
2. Step 2: Convert to fraction form
   12,636/28,080 = 28,080/x
3. Step 3: Cross multiply
   12,636x = 28,080 × 28,080
4. Step 4: Simplify right side
   12,636x = 788,486,400
5. Step 5: Solve for x
   x = 788,486,400/12,636
6. Step 6: Final answer
   x = 62,400