Finding the Third Proportional to 1,287.94 and 2,022.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,287.94 : 2,022.56 = 2,022.56 : x
2. Step 2: Convert to fraction form
   1,287.94/2,022.56 = 2,022.56/x
3. Step 3: Cross multiply
   1,287.94x = 2,022.56 × 2,022.56
4. Step 4: Simplify right side
   1,287.94x = 4,090,759.07
5. Step 5: Solve for x
   x = 4,090,759.07/1,287.94
6. Step 6: Final answer
   x = 3,176.21