Finding the Fourth Proportional to 1,440.27, 1,986.86 and 850.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,440.27 : 1,986.86 = 850.52 : x
2. Step 2: Convert to fraction form
   1,440.27/1,986.86 = 850.52/x
3. Step 3: Cross multiply
   1,440.27x = 1,986.86 × 850.52
4. Step 4: Simplify right side
   1,440.27x = 1,689,871.26
5. Step 5: Solve for x
   x = 1,689,871.26/1,440.27
6. Step 6: Final answer
   x = 1,173.30