Finding the Third Proportional to 8,561.25 and 18,401.63

Step by Step Solution

1. Step 1: Write the proportion equation
   8,561.25 : 18,401.63 = 18,401.63 : x
2. Step 2: Convert to fraction form
   8,561.25/18,401.63 = 18,401.63/x
3. Step 3: Cross multiply
   8,561.25x = 18,401.63 × 18,401.63
4. Step 4: Simplify right side
   8,561.25x = 338,619,802.64
5. Step 5: Solve for x
   x = 338,619,802.64/8,561.25
6. Step 6: Final answer
   x = 39,552.61