Finding the Third Proportional to 18,538.25 and 39,992.50

Step by Step Solution

1. Step 1: Write the proportion equation
   18,538.25 : 39,992.50 = 39,992.50 : x
2. Step 2: Convert to fraction form
   18,538.25/39,992.50 = 39,992.50/x
3. Step 3: Cross multiply
   18,538.25x = 39,992.50 × 39,992.50
4. Step 4: Simplify right side
   18,538.25x = 1,599,400,056.25
5. Step 5: Solve for x
   x = 1,599,400,056.25/18,538.25
6. Step 6: Final answer
   x = 86,275.68