Finding the Third Proportional to 8,405.75 and 12,365.25

Step by Step Solution

1. Step 1: Write the proportion equation
   8,405.75 : 12,365.25 = 12,365.25 : x
2. Step 2: Convert to fraction form
   8,405.75/12,365.25 = 12,365.25/x
3. Step 3: Cross multiply
   8,405.75x = 12,365.25 × 12,365.25
4. Step 4: Simplify right side
   8,405.75x = 152,899,407.56
5. Step 5: Solve for x
   x = 152,899,407.56/8,405.75
6. Step 6: Final answer
   x = 18,189.86