Finding the Third Proportional to 1,387.88 and 1,982.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,387.88 : 1,982.06 = 1,982.06 : x
2. Step 2: Convert to fraction form
   1,387.88/1,982.06 = 1,982.06/x
3. Step 3: Cross multiply
   1,387.88x = 1,982.06 × 1,982.06
4. Step 4: Simplify right side
   1,387.88x = 3,928,571.75
5. Step 5: Solve for x
   x = 3,928,571.75/1,387.88
6. Step 6: Final answer
   x = 2,830.64