Finding the Fourth Proportional to 2,155.26, 3,233.61 and 856.02

Step by Step Solution

1. Step 1: Write the proportion equation
   2,155.26 : 3,233.61 = 856.02 : x
2. Step 2: Convert to fraction form
   2,155.26/3,233.61 = 856.02/x
3. Step 3: Cross multiply
   2,155.26x = 3,233.61 × 856.02
4. Step 4: Simplify right side
   2,155.26x = 2,768,034.83
5. Step 5: Solve for x
   x = 2,768,034.83/2,155.26
6. Step 6: Final answer
   x = 1,284.32