Finding the Third Proportional to 1,300.50 and 1,989

Step by Step Solution

1. Step 1: Write the proportion equation
   1,300.50 : 1,989 = 1,989 : x
2. Step 2: Convert to fraction form
   1,300.50/1,989 = 1,989/x
3. Step 3: Cross multiply
   1,300.50x = 1,989 × 1,989
4. Step 4: Simplify right side
   1,300.50x = 3,956,121
5. Step 5: Solve for x
   x = 3,956,121/1,300.50
6. Step 6: Final answer
   x = 3,042