Finding the Third Proportional to 1,388 and 1,998

Step by Step Solution

1. Step 1: Write the proportion equation
   1,388 : 1,998 = 1,998 : x
2. Step 2: Convert to fraction form
   1,388/1,998 = 1,998/x
3. Step 3: Cross multiply
   1,388x = 1,998 × 1,998
4. Step 4: Simplify right side
   1,388x = 3,992,004
5. Step 5: Solve for x
   x = 3,992,004/1,388
6. Step 6: Final answer
   x = 2,876.08