Finding the Third Proportional to 12,681.50 and 19,713

Step by Step Solution

1. Step 1: Write the proportion equation
   12,681.50 : 19,713 = 19,713 : x
2. Step 2: Convert to fraction form
   12,681.50/19,713 = 19,713/x
3. Step 3: Cross multiply
   12,681.50x = 19,713 × 19,713
4. Step 4: Simplify right side
   12,681.50x = 388,602,369
5. Step 5: Solve for x
   x = 388,602,369/12,681.50
6. Step 6: Final answer
   x = 30,643.25