Finding the Third Proportional to 12,588 and 19,713

Step by Step Solution

1. Step 1: Write the proportion equation
   12,588 : 19,713 = 19,713 : x
2. Step 2: Convert to fraction form
   12,588/19,713 = 19,713/x
3. Step 3: Cross multiply
   12,588x = 19,713 × 19,713
4. Step 4: Simplify right side
   12,588x = 388,602,369
5. Step 5: Solve for x
   x = 388,602,369/12,588
6. Step 6: Final answer
   x = 30,870.86