Finding the Third Proportional to 8,300.25 and 12,408.75

Step by Step Solution

1. Step 1: Write the proportion equation
   8,300.25 : 12,408.75 = 12,408.75 : x
2. Step 2: Convert to fraction form
   8,300.25/12,408.75 = 12,408.75/x
3. Step 3: Cross multiply
   8,300.25x = 12,408.75 × 12,408.75
4. Step 4: Simplify right side
   8,300.25x = 153,977,076.56
5. Step 5: Solve for x
   x = 153,977,076.56/8,300.25
6. Step 6: Final answer
   x = 18,550.90