Finding the Third Proportional to 17,136.56 and 18,959.06

Step by Step Solution

1. Step 1: Write the proportion equation
   17,136.56 : 18,959.06 = 18,959.06 : x
2. Step 2: Convert to fraction form
   17,136.56/18,959.06 = 18,959.06/x
3. Step 3: Cross multiply
   17,136.56x = 18,959.06 × 18,959.06
4. Step 4: Simplify right side
   17,136.56x = 359,446,050.88
5. Step 5: Solve for x
   x = 359,446,050.88/17,136.56
6. Step 6: Final answer
   x = 20,975.39