Finding the Fourth Proportional to 1,443.62, 1,992.07 and 854.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,443.62 : 1,992.07 = 854.05 : x
2. Step 2: Convert to fraction form
   1,443.62/1,992.07 = 854.05/x
3. Step 3: Cross multiply
   1,443.62x = 1,992.07 × 854.05
4. Step 4: Simplify right side
   1,443.62x = 1,701,327.38
5. Step 5: Solve for x
   x = 1,701,327.38/1,443.62
6. Step 6: Final answer
   x = 1,178.51