Finding the Fourth Proportional to 2,606.39, 3,909.83 and 851.33

Step by Step Solution

1. Step 1: Write the proportion equation
   2,606.39 : 3,909.83 = 851.33 : x
2. Step 2: Convert to fraction form
   2,606.39/3,909.83 = 851.33/x
3. Step 3: Cross multiply
   2,606.39x = 3,909.83 × 851.33
4. Step 4: Simplify right side
   2,606.39x = 3,328,543.89
5. Step 5: Solve for x
   x = 3,328,543.89/2,606.39
6. Step 6: Final answer
   x = 1,277.07