Finding the Third Proportional to 18,396.50 and 39,993.50

Step by Step Solution

1. Step 1: Write the proportion equation
   18,396.50 : 39,993.50 = 39,993.50 : x
2. Step 2: Convert to fraction form
   18,396.50/39,993.50 = 39,993.50/x
3. Step 3: Cross multiply
   18,396.50x = 39,993.50 × 39,993.50
4. Step 4: Simplify right side
   18,396.50x = 1,599,480,042.25
5. Step 5: Solve for x
   x = 1,599,480,042.25/18,396.50
6. Step 6: Final answer
   x = 86,944.80