Finding the Fourth Proportional to 2,150.69, 3,224.21 and 851.45

Step by Step Solution

1. Step 1: Write the proportion equation
   2,150.69 : 3,224.21 = 851.45 : x
2. Step 2: Convert to fraction form
   2,150.69/3,224.21 = 851.45/x
3. Step 3: Cross multiply
   2,150.69x = 3,224.21 × 851.45
4. Step 4: Simplify right side
   2,150.69x = 2,745,233.23
5. Step 5: Solve for x
   x = 2,745,233.23/2,150.69
6. Step 6: Final answer
   x = 1,276.45