Finding the Third Proportional to 8,256.94 and 12,387.94

Step by Step Solution

1. Step 1: Write the proportion equation
   8,256.94 : 12,387.94 = 12,387.94 : x
2. Step 2: Convert to fraction form
   8,256.94/12,387.94 = 12,387.94/x
3. Step 3: Cross multiply
   8,256.94x = 12,387.94 × 12,387.94
4. Step 4: Simplify right side
   8,256.94x = 153,460,995.50
5. Step 5: Solve for x
   x = 153,460,995.50/8,256.94
6. Step 6: Final answer
   x = 18,585.70