Finding the Third Proportional to 8,134.69 and 12,288.70

Step by Step Solution

1. Step 1: Write the proportion equation
   8,134.69 : 12,288.70 = 12,288.70 : x
2. Step 2: Convert to fraction form
   8,134.69/12,288.70 = 12,288.70/x
3. Step 3: Cross multiply
   8,134.69x = 12,288.70 × 12,288.70
4. Step 4: Simplify right side
   8,134.69x = 151,012,260.50
5. Step 5: Solve for x
   x = 151,012,260.50/8,134.69
6. Step 6: Final answer
   x = 18,563.99