Finding the Third Proportional to 12,078 and 28,216.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,078 : 28,216.50 = 28,216.50 : x
2. Step 2: Convert to fraction form
   12,078/28,216.50 = 28,216.50/x
3. Step 3: Cross multiply
   12,078x = 28,216.50 × 28,216.50
4. Step 4: Simplify right side
   12,078x = 796,170,872.25
5. Step 5: Solve for x
   x = 796,170,872.25/12,078
6. Step 6: Final answer
   x = 65,919.10