Finding the Third Proportional to 8,147.25 and 12,218.63

Step by Step Solution

1. Step 1: Write the proportion equation
   8,147.25 : 12,218.63 = 12,218.63 : x
2. Step 2: Convert to fraction form
   8,147.25/12,218.63 = 12,218.63/x
3. Step 3: Cross multiply
   8,147.25x = 12,218.63 × 12,218.63
4. Step 4: Simplify right side
   8,147.25x = 149,294,796.89
5. Step 5: Solve for x
   x = 149,294,796.89/8,147.25
6. Step 6: Final answer
   x = 18,324.56