Finding the Fourth Proportional to 1,443.22, 2,164.79 and 862.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,443.22 : 2,164.79 = 862.25 : x
2. Step 2: Convert to fraction form
   1,443.22/2,164.79 = 862.25/x
3. Step 3: Cross multiply
   1,443.22x = 2,164.79 × 862.25
4. Step 4: Simplify right side
   1,443.22x = 1,866,581.51
5. Step 5: Solve for x
   x = 1,866,581.51/1,443.22
6. Step 6: Final answer
   x = 1,293.35