Finding the Third Proportional to 18,742.50 and 39,589.31

Step by Step Solution

1. Step 1: Write the proportion equation
   18,742.50 : 39,589.31 = 39,589.31 : x
2. Step 2: Convert to fraction form
   18,742.50/39,589.31 = 39,589.31/x
3. Step 3: Cross multiply
   18,742.50x = 39,589.31 × 39,589.31
4. Step 4: Simplify right side
   18,742.50x = 1,567,313,664.22
5. Step 5: Solve for x
   x = 1,567,313,664.22/18,742.50
6. Step 6: Final answer
   x = 83,623.51