Finding the Third Proportional to 1,333 and 1,990

Step by Step Solution

1. Step 1: Write the proportion equation
   1,333 : 1,990 = 1,990 : x
2. Step 2: Convert to fraction form
   1,333/1,990 = 1,990/x
3. Step 3: Cross multiply
   1,333x = 1,990 × 1,990
4. Step 4: Simplify right side
   1,333x = 3,960,100
5. Step 5: Solve for x
   x = 3,960,100/1,333
6. Step 6: Final answer
   x = 2,970.82