Finding the Third Proportional to 8,200.13 and 18,007.31

Step by Step Solution

1. Step 1: Write the proportion equation
   8,200.13 : 18,007.31 = 18,007.31 : x
2. Step 2: Convert to fraction form
   8,200.13/18,007.31 = 18,007.31/x
3. Step 3: Cross multiply
   8,200.13x = 18,007.31 × 18,007.31
4. Step 4: Simplify right side
   8,200.13x = 324,263,303.47
5. Step 5: Solve for x
   x = 324,263,303.47/8,200.13
6. Step 6: Final answer
   x = 39,543.70