Finding the Fourth Proportional to 2,256.69, 3,385.59 and 851.13

Step by Step Solution

1. Step 1: Write the proportion equation
   2,256.69 : 3,385.59 = 851.13 : x
2. Step 2: Convert to fraction form
   2,256.69/3,385.59 = 851.13/x
3. Step 3: Cross multiply
   2,256.69x = 3,385.59 × 851.13
4. Step 4: Simplify right side
   2,256.69x = 2,881,556.03
5. Step 5: Solve for x
   x = 2,881,556.03/2,256.69
6. Step 6: Final answer
   x = 1,276.89