Finding the Fourth Proportional to 3,643.72, 5,028.78 and 2,071.96

Step by Step Solution

1. Step 1: Write the proportion equation
   3,643.72 : 5,028.78 = 2,071.96 : x
2. Step 2: Convert to fraction form
   3,643.72/5,028.78 = 2,071.96/x
3. Step 3: Cross multiply
   3,643.72x = 5,028.78 × 2,071.96
4. Step 4: Simplify right side
   3,643.72x = 10,419,431.01
5. Step 5: Solve for x
   x = 10,419,431.01/3,643.72
6. Step 6: Final answer
   x = 2,859.56