Finding the Fourth Proportional to 1,441.43, 1,987.40 and 851.75

Step by Step Solution

1. Step 1: Write the proportion equation
   1,441.43 : 1,987.40 = 851.75 : x
2. Step 2: Convert to fraction form
   1,441.43/1,987.40 = 851.75/x
3. Step 3: Cross multiply
   1,441.43x = 1,987.40 × 851.75
4. Step 4: Simplify right side
   1,441.43x = 1,692,753.75
5. Step 5: Solve for x
   x = 1,692,753.75/1,441.43
6. Step 6: Final answer
   x = 1,174.36