Finding the Fourth Proportional to 2,155.55, 3,233.39 and 1,289.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,155.55 : 3,233.39 = 1,289.25 : x
2. Step 2: Convert to fraction form
   2,155.55/3,233.39 = 1,289.25/x
3. Step 3: Cross multiply
   2,155.55x = 3,233.39 × 1,289.25
4. Step 4: Simplify right side
   2,155.55x = 4,168,641.61
5. Step 5: Solve for x
   x = 4,168,641.61/2,155.55
6. Step 6: Final answer
   x = 1,933.92