Finding the Third Proportional to 12,681.25 and 19,712.63

Step by Step Solution

1. Step 1: Write the proportion equation
   12,681.25 : 19,712.63 = 19,712.63 : x
2. Step 2: Convert to fraction form
   12,681.25/19,712.63 = 19,712.63/x
3. Step 3: Cross multiply
   12,681.25x = 19,712.63 × 19,712.63
4. Step 4: Simplify right side
   12,681.25x = 388,587,584.39
5. Step 5: Solve for x
   x = 388,587,584.39/12,681.25
6. Step 6: Final answer
   x = 30,642.69