Finding the Fourth Proportional to 1,443.69, 1,992.15 and 854.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,443.69 : 1,992.15 = 854.22 : x
2. Step 2: Convert to fraction form
   1,443.69/1,992.15 = 854.22/x
3. Step 3: Cross multiply
   1,443.69x = 1,992.15 × 854.22
4. Step 4: Simplify right side
   1,443.69x = 1,701,734.37
5. Step 5: Solve for x
   x = 1,701,734.37/1,443.69
6. Step 6: Final answer
   x = 1,178.74