Finding the Third Proportional to 21,200 and 46,640

Step by Step Solution

1. Step 1: Write the proportion equation
   21,200 : 46,640 = 46,640 : x
2. Step 2: Convert to fraction form
   21,200/46,640 = 46,640/x
3. Step 3: Cross multiply
   21,200x = 46,640 × 46,640
4. Step 4: Simplify right side
   21,200x = 2,175,289,600
5. Step 5: Solve for x
   x = 2,175,289,600/21,200
6. Step 6: Final answer
   x = 102,608