Finding the Fourth Proportional to 1,443.45, 1,991.88 and 854.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,443.45 : 1,991.88 = 854.04 : x
2. Step 2: Convert to fraction form
   1,443.45/1,991.88 = 854.04/x
3. Step 3: Cross multiply
   1,443.45x = 1,991.88 × 854.04
4. Step 4: Simplify right side
   1,443.45x = 1,701,145.20
5. Step 5: Solve for x
   x = 1,701,145.20/1,443.45
6. Step 6: Final answer
   x = 1,178.53