Finding the Third Proportional to 13,992.75 and 30,780

Step by Step Solution

1. Step 1: Write the proportion equation
   13,992.75 : 30,780 = 30,780 : x
2. Step 2: Convert to fraction form
   13,992.75/30,780 = 30,780/x
3. Step 3: Cross multiply
   13,992.75x = 30,780 × 30,780
4. Step 4: Simplify right side
   13,992.75x = 947,408,400
5. Step 5: Solve for x
   x = 947,408,400/13,992.75
6. Step 6: Final answer
   x = 67,707.09