Finding the Fourth Proportional to 3,644.31, 5,028.95 and 2,151.89

Step by Step Solution

1. Step 1: Write the proportion equation
   3,644.31 : 5,028.95 = 2,151.89 : x
2. Step 2: Convert to fraction form
   3,644.31/5,028.95 = 2,151.89/x
3. Step 3: Cross multiply
   3,644.31x = 5,028.95 × 2,151.89
4. Step 4: Simplify right side
   3,644.31x = 10,821,747.22
5. Step 5: Solve for x
   x = 10,821,747.22/3,644.31
6. Step 6: Final answer
   x = 2,969.49