Finding the Fourth Proportional to 1,442.16, 1,990.04 and 852.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,442.16 : 1,990.04 = 852.48 : x
2. Step 2: Convert to fraction form
   1,442.16/1,990.04 = 852.48/x
3. Step 3: Cross multiply
   1,442.16x = 1,990.04 × 852.48
4. Step 4: Simplify right side
   1,442.16x = 1,696,465.04
5. Step 5: Solve for x
   x = 1,696,465.04/1,442.16
6. Step 6: Final answer
   x = 1,176.34