Finding the Fourth Proportional to 1,440.48, 1,987.83 and 851.03

Step by Step Solution

1. Step 1: Write the proportion equation
   1,440.48 : 1,987.83 = 851.03 : x
2. Step 2: Convert to fraction form
   1,440.48/1,987.83 = 851.03/x
3. Step 3: Cross multiply
   1,440.48x = 1,987.83 × 851.03
4. Step 4: Simplify right side
   1,440.48x = 1,691,693.03
5. Step 5: Solve for x
   x = 1,691,693.03/1,440.48
6. Step 6: Final answer
   x = 1,174.40