Finding the Fourth Proportional to 1,443.83, 1,992.20 and 854.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,443.83 : 1,992.20 = 854.55 : x
2. Step 2: Convert to fraction form
   1,443.83/1,992.20 = 854.55/x
3. Step 3: Cross multiply
   1,443.83x = 1,992.20 × 854.55
4. Step 4: Simplify right side
   1,443.83x = 1,702,430.24
5. Step 5: Solve for x
   x = 1,702,430.24/1,443.83
6. Step 6: Final answer
   x = 1,179.11