Finding the Fourth Proportional to 2,154.72, 3,228.24 and 902.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,154.72 : 3,228.24 = 902.55 : x
2. Step 2: Convert to fraction form
   2,154.72/3,228.24 = 902.55/x
3. Step 3: Cross multiply
   2,154.72x = 3,228.24 × 902.55
4. Step 4: Simplify right side
   2,154.72x = 2,913,648.01
5. Step 5: Solve for x
   x = 2,913,648.01/2,154.72
6. Step 6: Final answer
   x = 1,352.22