Finding the Third Proportional to 2,109.75 and 4,920

Step by Step Solution

1. Step 1: Write the proportion equation
   2,109.75 : 4,920 = 4,920 : x
2. Step 2: Convert to fraction form
   2,109.75/4,920 = 4,920/x
3. Step 3: Cross multiply
   2,109.75x = 4,920 × 4,920
4. Step 4: Simplify right side
   2,109.75x = 24,206,400
5. Step 5: Solve for x
   x = 24,206,400/2,109.75
6. Step 6: Final answer
   x = 11,473.59