Finding the Third Proportional to 10,648 and 12,120

Step by Step Solution

1. Step 1: Write the proportion equation
   10,648 : 12,120 = 12,120 : x
2. Step 2: Convert to fraction form
   10,648/12,120 = 12,120/x
3. Step 3: Cross multiply
   10,648x = 12,120 × 12,120
4. Step 4: Simplify right side
   10,648x = 146,894,400
5. Step 5: Solve for x
   x = 146,894,400/10,648
6. Step 6: Final answer
   x = 13,795.49