Finding the Third Proportional to 1,680 and 3,648

Step by Step Solution

1. Step 1: Write the proportion equation
   1,680 : 3,648 = 3,648 : x
2. Step 2: Convert to fraction form
   1,680/3,648 = 3,648/x
3. Step 3: Cross multiply
   1,680x = 3,648 × 3,648
4. Step 4: Simplify right side
   1,680x = 13,307,904
5. Step 5: Solve for x
   x = 13,307,904/1,680
6. Step 6: Final answer
   x = 7,921.37