Finding the Fourth Proportional to 1,443.64, 2,164.02 and 712.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,443.64 : 2,164.02 = 712.12 : x
2. Step 2: Convert to fraction form
   1,443.64/2,164.02 = 712.12/x
3. Step 3: Cross multiply
   1,443.64x = 2,164.02 × 712.12
4. Step 4: Simplify right side
   1,443.64x = 1,541,041.92
5. Step 5: Solve for x
   x = 1,541,041.92/1,443.64
6. Step 6: Final answer
   x = 1,067.47