Finding the Fourth Proportional to 1,443.08, 1,991.46 and 845.44

Step by Step Solution

1. Step 1: Write the proportion equation
   1,443.08 : 1,991.46 = 845.44 : x
2. Step 2: Convert to fraction form
   1,443.08/1,991.46 = 845.44/x
3. Step 3: Cross multiply
   1,443.08x = 1,991.46 × 845.44
4. Step 4: Simplify right side
   1,443.08x = 1,683,653.38
5. Step 5: Solve for x
   x = 1,683,653.38/1,443.08
6. Step 6: Final answer
   x = 1,166.71