Finding the Third Proportional to 12,936 and 20,029.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,936 : 20,029.50 = 20,029.50 : x
2. Step 2: Convert to fraction form
   12,936/20,029.50 = 20,029.50/x
3. Step 3: Cross multiply
   12,936x = 20,029.50 × 20,029.50
4. Step 4: Simplify right side
   12,936x = 401,180,870.25
5. Step 5: Solve for x
   x = 401,180,870.25/12,936
6. Step 6: Final answer
   x = 31,012.75