Finding the Third Proportional to 8,440.45 and 18,323.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,440.45 : 18,323.72 = 18,323.72 : x
2. Step 2: Convert to fraction form
   8,440.45/18,323.72 = 18,323.72/x
3. Step 3: Cross multiply
   8,440.45x = 18,323.72 × 18,323.72
4. Step 4: Simplify right side
   8,440.45x = 335,758,668.83
5. Step 5: Solve for x
   x = 335,758,668.83/8,440.45
6. Step 6: Final answer
   x = 39,779.70