Finding the Fourth Proportional to 2,151.55, 3,227.73 and 853.93

Step by Step Solution

1. Step 1: Write the proportion equation
   2,151.55 : 3,227.73 = 853.93 : x
2. Step 2: Convert to fraction form
   2,151.55/3,227.73 = 853.93/x
3. Step 3: Cross multiply
   2,151.55x = 3,227.73 × 853.93
4. Step 4: Simplify right side
   2,151.55x = 2,756,255.48
5. Step 5: Solve for x
   x = 2,756,255.48/2,151.55
6. Step 6: Final answer
   x = 1,281.06