Finding the Fourth Proportional to 2,167.56, 3,252.42 and 851.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,167.56 : 3,252.42 = 851.31 : x
2. Step 2: Convert to fraction form
   2,167.56/3,252.42 = 851.31/x
3. Step 3: Cross multiply
   2,167.56x = 3,252.42 × 851.31
4. Step 4: Simplify right side
   2,167.56x = 2,768,817.67
5. Step 5: Solve for x
   x = 2,768,817.67/2,167.56
6. Step 6: Final answer
   x = 1,277.39