Finding the Fourth Proportional to 1,441.71, 1,989.54 and 852.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,441.71 : 1,989.54 = 852.57 : x
2. Step 2: Convert to fraction form
   1,441.71/1,989.54 = 852.57/x
3. Step 3: Cross multiply
   1,441.71x = 1,989.54 × 852.57
4. Step 4: Simplify right side
   1,441.71x = 1,696,222.12
5. Step 5: Solve for x
   x = 1,696,222.12/1,441.71
6. Step 6: Final answer
   x = 1,176.53