Finding the Fourth Proportional to 1,550.59, 2,139.76 and 851.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,550.59 : 2,139.76 = 851.96 : x
2. Step 2: Convert to fraction form
   1,550.59/2,139.76 = 851.96/x
3. Step 3: Cross multiply
   1,550.59x = 2,139.76 × 851.96
4. Step 4: Simplify right side
   1,550.59x = 1,822,989.93
5. Step 5: Solve for x
   x = 1,822,989.93/1,550.59
6. Step 6: Final answer
   x = 1,175.68