Finding the Third Proportional to 12,717.38 and 19,715.06

Step by Step Solution

1. Step 1: Write the proportion equation
   12,717.38 : 19,715.06 = 19,715.06 : x
2. Step 2: Convert to fraction form
   12,717.38/19,715.06 = 19,715.06/x
3. Step 3: Cross multiply
   12,717.38x = 19,715.06 × 19,715.06
4. Step 4: Simplify right side
   12,717.38x = 388,683,689.38
5. Step 5: Solve for x
   x = 388,683,689.38/12,717.38
6. Step 6: Final answer
   x = 30,563.20