Finding the Third Proportional to 11,718 and 17,578

Step by Step Solution

1. Step 1: Write the proportion equation
   11,718 : 17,578 = 17,578 : x
2. Step 2: Convert to fraction form
   11,718/17,578 = 17,578/x
3. Step 3: Cross multiply
   11,718x = 17,578 × 17,578
4. Step 4: Simplify right side
   11,718x = 308,986,084
5. Step 5: Solve for x
   x = 308,986,084/11,718
6. Step 6: Final answer
   x = 26,368.50