Finding the Fourth Proportional to 2,836.09, 4,255.58 and 1,275.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,836.09 : 4,255.58 = 1,275.78 : x
2. Step 2: Convert to fraction form
   2,836.09/4,255.58 = 1,275.78/x
3. Step 3: Cross multiply
   2,836.09x = 4,255.58 × 1,275.78
4. Step 4: Simplify right side
   2,836.09x = 5,429,194.49
5. Step 5: Solve for x
   x = 5,429,194.49/2,836.09
6. Step 6: Final answer
   x = 1,914.32