Finding the Third Proportional to 8,557.50 and 18,388.25

Step by Step Solution

1. Step 1: Write the proportion equation
   8,557.50 : 18,388.25 = 18,388.25 : x
2. Step 2: Convert to fraction form
   8,557.50/18,388.25 = 18,388.25/x
3. Step 3: Cross multiply
   8,557.50x = 18,388.25 × 18,388.25
4. Step 4: Simplify right side
   8,557.50x = 338,127,738.06
5. Step 5: Solve for x
   x = 338,127,738.06/8,557.50
6. Step 6: Final answer
   x = 39,512.44