Finding the Fourth Proportional to 2,311.56, 3,468.42 and 851.22

Step by Step Solution

1. Step 1: Write the proportion equation
   2,311.56 : 3,468.42 = 851.22 : x
2. Step 2: Convert to fraction form
   2,311.56/3,468.42 = 851.22/x
3. Step 3: Cross multiply
   2,311.56x = 3,468.42 × 851.22
4. Step 4: Simplify right side
   2,311.56x = 2,952,388.47
5. Step 5: Solve for x
   x = 2,952,388.47/2,311.56
6. Step 6: Final answer
   x = 1,277.23