Finding the Third Proportional to 8,641.69 and 19,708.31

Step by Step Solution

1. Step 1: Write the proportion equation
   8,641.69 : 19,708.31 = 19,708.31 : x
2. Step 2: Convert to fraction form
   8,641.69/19,708.31 = 19,708.31/x
3. Step 3: Cross multiply
   8,641.69x = 19,708.31 × 19,708.31
4. Step 4: Simplify right side
   8,641.69x = 388,417,581.60
5. Step 5: Solve for x
   x = 388,417,581.60/8,641.69
6. Step 6: Final answer
   x = 44,946.96