Finding the Third Proportional to 8,476.31 and 18,439.31

Step by Step Solution

1. Step 1: Write the proportion equation
   8,476.31 : 18,439.31 = 18,439.31 : x
2. Step 2: Convert to fraction form
   8,476.31/18,439.31 = 18,439.31/x
3. Step 3: Cross multiply
   8,476.31x = 18,439.31 × 18,439.31
4. Step 4: Simplify right side
   8,476.31x = 340,008,245.47
5. Step 5: Solve for x
   x = 340,008,245.47/8,476.31
6. Step 6: Final answer
   x = 40,112.75