Finding the Third Proportional to 12,642 and 28,815

Step by Step Solution

1. Step 1: Write the proportion equation
   12,642 : 28,815 = 28,815 : x
2. Step 2: Convert to fraction form
   12,642/28,815 = 28,815/x
3. Step 3: Cross multiply
   12,642x = 28,815 × 28,815
4. Step 4: Simplify right side
   12,642x = 830,304,225
5. Step 5: Solve for x
   x = 830,304,225/12,642
6. Step 6: Final answer
   x = 65,678.23