Finding the Third Proportional to 17,640 and 27,243

Step by Step Solution

1. Step 1: Write the proportion equation
   17,640 : 27,243 = 27,243 : x
2. Step 2: Convert to fraction form
   17,640/27,243 = 27,243/x
3. Step 3: Cross multiply
   17,640x = 27,243 × 27,243
4. Step 4: Simplify right side
   17,640x = 742,181,049
5. Step 5: Solve for x
   x = 742,181,049/17,640
6. Step 6: Final answer
   x = 42,073.76