Finding the Fourth Proportional to 1,375.69, 1,898.79 and 851.41

Step by Step Solution

1. Step 1: Write the proportion equation
   1,375.69 : 1,898.79 = 851.41 : x
2. Step 2: Convert to fraction form
   1,375.69/1,898.79 = 851.41/x
3. Step 3: Cross multiply
   1,375.69x = 1,898.79 × 851.41
4. Step 4: Simplify right side
   1,375.69x = 1,616,648.79
5. Step 5: Solve for x
   x = 1,616,648.79/1,375.69
6. Step 6: Final answer
   x = 1,175.15