Finding the Third Proportional to 18,356.63 and 39,831.75

Step by Step Solution

1. Step 1: Write the proportion equation
   18,356.63 : 39,831.75 = 39,831.75 : x
2. Step 2: Convert to fraction form
   18,356.63/39,831.75 = 39,831.75/x
3. Step 3: Cross multiply
   18,356.63x = 39,831.75 × 39,831.75
4. Step 4: Simplify right side
   18,356.63x = 1,586,568,308.06
5. Step 5: Solve for x
   x = 1,586,568,308.06/18,356.63
6. Step 6: Final answer
   x = 86,430.28