Finding the Third Proportional to 12,820 and 23,720

Step by Step Solution

1. Step 1: Write the proportion equation
   12,820 : 23,720 = 23,720 : x
2. Step 2: Convert to fraction form
   12,820/23,720 = 23,720/x
3. Step 3: Cross multiply
   12,820x = 23,720 × 23,720
4. Step 4: Simplify right side
   12,820x = 562,638,400
5. Step 5: Solve for x
   x = 562,638,400/12,820
6. Step 6: Final answer
   x = 43,887.55