Finding the Fourth Proportional to 1,443.71, 1,992.65 and 854.64

Step by Step Solution

1. Step 1: Write the proportion equation
   1,443.71 : 1,992.65 = 854.64 : x
2. Step 2: Convert to fraction form
   1,443.71/1,992.65 = 854.64/x
3. Step 3: Cross multiply
   1,443.71x = 1,992.65 × 854.64
4. Step 4: Simplify right side
   1,443.71x = 1,702,994.12
5. Step 5: Solve for x
   x = 1,702,994.12/1,443.71
6. Step 6: Final answer
   x = 1,179.60