Finding the Fourth Proportional to 1,443.76, 1,992.56 and 854.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,443.76 : 1,992.56 = 854.30 : x
2. Step 2: Convert to fraction form
   1,443.76/1,992.56 = 854.30/x
3. Step 3: Cross multiply
   1,443.76x = 1,992.56 × 854.30
4. Step 4: Simplify right side
   1,443.76x = 1,702,239.52
5. Step 5: Solve for x
   x = 1,702,239.52/1,443.76
6. Step 6: Final answer
   x = 1,179.03