Finding the Fourth Proportional to 3,646.89, 5,032.56 and 2,155.29

Step by Step Solution

1. Step 1: Write the proportion equation
   3,646.89 : 5,032.56 = 2,155.29 : x
2. Step 2: Convert to fraction form
   3,646.89/5,032.56 = 2,155.29/x
3. Step 3: Cross multiply
   3,646.89x = 5,032.56 × 2,155.29
4. Step 4: Simplify right side
   3,646.89x = 10,846,626.24
5. Step 5: Solve for x
   x = 10,846,626.24/3,646.89
6. Step 6: Final answer
   x = 2,974.21