Finding the Fourth Proportional to 1,442.94, 1,990.89 and 845.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,442.94 : 1,990.89 = 845.34 : x
2. Step 2: Convert to fraction form
   1,442.94/1,990.89 = 845.34/x
3. Step 3: Cross multiply
   1,442.94x = 1,990.89 × 845.34
4. Step 4: Simplify right side
   1,442.94x = 1,682,978.95
5. Step 5: Solve for x
   x = 1,682,978.95/1,442.94
6. Step 6: Final answer
   x = 1,166.35