Finding the Third Proportional to 12,831 and 30,579

Step by Step Solution

1. Step 1: Write the proportion equation
   12,831 : 30,579 = 30,579 : x
2. Step 2: Convert to fraction form
   12,831/30,579 = 30,579/x
3. Step 3: Cross multiply
   12,831x = 30,579 × 30,579
4. Step 4: Simplify right side
   12,831x = 935,075,241
5. Step 5: Solve for x
   x = 935,075,241/12,831
6. Step 6: Final answer
   x = 72,876.26