Finding the Fourth Proportional to 3,643.38, 5,028.48 and 2,151.23

Step by Step Solution

1. Step 1: Write the proportion equation
   3,643.38 : 5,028.48 = 2,151.23 : x
2. Step 2: Convert to fraction form
   3,643.38/5,028.48 = 2,151.23/x
3. Step 3: Cross multiply
   3,643.38x = 5,028.48 × 2,151.23
4. Step 4: Simplify right side
   3,643.38x = 10,817,391.89
5. Step 5: Solve for x
   x = 10,817,391.89/3,643.38
6. Step 6: Final answer
   x = 2,969.05