Finding the Third Proportional to 1,396.31 and 2,112.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,396.31 : 2,112.56 = 2,112.56 : x
2. Step 2: Convert to fraction form
   1,396.31/2,112.56 = 2,112.56/x
3. Step 3: Cross multiply
   1,396.31x = 2,112.56 × 2,112.56
4. Step 4: Simplify right side
   1,396.31x = 4,462,920.32
5. Step 5: Solve for x
   x = 4,462,920.32/1,396.31
6. Step 6: Final answer
   x = 3,196.22