Finding the Third Proportional to 8,315.25 and 12,147.75

Step by Step Solution

1. Step 1: Write the proportion equation
   8,315.25 : 12,147.75 = 12,147.75 : x
2. Step 2: Convert to fraction form
   8,315.25/12,147.75 = 12,147.75/x
3. Step 3: Cross multiply
   8,315.25x = 12,147.75 × 12,147.75
4. Step 4: Simplify right side
   8,315.25x = 147,567,830.06
5. Step 5: Solve for x
   x = 147,567,830.06/8,315.25
6. Step 6: Final answer
   x = 17,746.65