Finding the Fourth Proportional to 2,606.97, 3,909.49 and 851.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,606.97 : 3,909.49 = 851.57 : x
2. Step 2: Convert to fraction form
   2,606.97/3,909.49 = 851.57/x
3. Step 3: Cross multiply
   2,606.97x = 3,909.49 × 851.57
4. Step 4: Simplify right side
   2,606.97x = 3,329,182.72
5. Step 5: Solve for x
   x = 3,329,182.72/2,606.97
6. Step 6: Final answer
   x = 1,277.03