Finding the Third Proportional to 1,387.97 and 2,016.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,387.97 : 2,016.56 = 2,016.56 : x
2. Step 2: Convert to fraction form
   1,387.97/2,016.56 = 2,016.56/x
3. Step 3: Cross multiply
   1,387.97x = 2,016.56 × 2,016.56
4. Step 4: Simplify right side
   1,387.97x = 4,066,524.32
5. Step 5: Solve for x
   x = 4,066,524.32/1,387.97
6. Step 6: Final answer
   x = 2,929.84