Finding the Fourth Proportional to 1,443.20, 2,164.14 and 712.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,443.20 : 2,164.14 = 712.49 : x
2. Step 2: Convert to fraction form
   1,443.20/2,164.14 = 712.49/x
3. Step 3: Cross multiply
   1,443.20x = 2,164.14 × 712.49
4. Step 4: Simplify right side
   1,443.20x = 1,541,917.29
5. Step 5: Solve for x
   x = 1,541,917.29/1,443.20
6. Step 6: Final answer
   x = 1,068.41