Finding the Third Proportional to 19,679 and 28,786

Step by Step Solution

1. Step 1: Write the proportion equation
   19,679 : 28,786 = 28,786 : x
2. Step 2: Convert to fraction form
   19,679/28,786 = 28,786/x
3. Step 3: Cross multiply
   19,679x = 28,786 × 28,786
4. Step 4: Simplify right side
   19,679x = 828,633,796
5. Step 5: Solve for x
   x = 828,633,796/19,679
6. Step 6: Final answer
   x = 42,107.52