Finding the Third Proportional to 8,117.72 and 12,294.28

Step by Step Solution

1. Step 1: Write the proportion equation
   8,117.72 : 12,294.28 = 12,294.28 : x
2. Step 2: Convert to fraction form
   8,117.72/12,294.28 = 12,294.28/x
3. Step 3: Cross multiply
   8,117.72x = 12,294.28 × 12,294.28
4. Step 4: Simplify right side
   8,117.72x = 151,149,351.45
5. Step 5: Solve for x
   x = 151,149,351.45/8,117.72
6. Step 6: Final answer
   x = 18,619.68