Finding the Fourth Proportional to 1,442.31, 1,990.37 and 852.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,442.31 : 1,990.37 = 852.83 : x
2. Step 2: Convert to fraction form
   1,442.31/1,990.37 = 852.83/x
3. Step 3: Cross multiply
   1,442.31x = 1,990.37 × 852.83
4. Step 4: Simplify right side
   1,442.31x = 1,697,446.89
5. Step 5: Solve for x
   x = 1,697,446.89/1,442.31
6. Step 6: Final answer
   x = 1,176.90