Finding the Third Proportional to 12,816.28 and 18,039.94

Step by Step Solution

1. Step 1: Write the proportion equation
   12,816.28 : 18,039.94 = 18,039.94 : x
2. Step 2: Convert to fraction form
   12,816.28/18,039.94 = 18,039.94/x
3. Step 3: Cross multiply
   12,816.28x = 18,039.94 × 18,039.94
4. Step 4: Simplify right side
   12,816.28x = 325,439,345.00
5. Step 5: Solve for x
   x = 325,439,345.00/12,816.28
6. Step 6: Final answer
   x = 25,392.65