Finding the Fourth Proportional to 1,443.84, 1,992.51 and 854.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,443.84 : 1,992.51 = 854.40 : x
2. Step 2: Convert to fraction form
   1,443.84/1,992.51 = 854.40/x
3. Step 3: Cross multiply
   1,443.84x = 1,992.51 × 854.40
4. Step 4: Simplify right side
   1,443.84x = 1,702,400.54
5. Step 5: Solve for x
   x = 1,702,400.54/1,443.84
6. Step 6: Final answer
   x = 1,179.08