Finding the Fourth Proportional to 1,550.38, 2,139.52 and 851.75

Step by Step Solution

1. Step 1: Write the proportion equation
   1,550.38 : 2,139.52 = 851.75 : x
2. Step 2: Convert to fraction form
   1,550.38/2,139.52 = 851.75/x
3. Step 3: Cross multiply
   1,550.38x = 2,139.52 × 851.75
4. Step 4: Simplify right side
   1,550.38x = 1,822,336.16
5. Step 5: Solve for x
   x = 1,822,336.16/1,550.38
6. Step 6: Final answer
   x = 1,175.42