Finding the Fourth Proportional to 1,441.18, 1,987.05 and 851.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,441.18 : 1,987.05 = 851.50 : x
2. Step 2: Convert to fraction form
   1,441.18/1,987.05 = 851.50/x
3. Step 3: Cross multiply
   1,441.18x = 1,987.05 × 851.50
4. Step 4: Simplify right side
   1,441.18x = 1,691,963.14
5. Step 5: Solve for x
   x = 1,691,963.14/1,441.18
6. Step 6: Final answer
   x = 1,174.02