Finding the Third Proportional to 2,120.25 and 4,300.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,120.25 : 4,300.25 = 4,300.25 : x
2. Step 2: Convert to fraction form
   2,120.25/4,300.25 = 4,300.25/x
3. Step 3: Cross multiply
   2,120.25x = 4,300.25 × 4,300.25
4. Step 4: Simplify right side
   2,120.25x = 18,492,150.06
5. Step 5: Solve for x
   x = 18,492,150.06/2,120.25
6. Step 6: Final answer
   x = 8,721.68