Finding the Fourth Proportional to 3,940.72, 5,889.54 and 3,629.36

Step by Step Solution

1. Step 1: Write the proportion equation
   3,940.72 : 5,889.54 = 3,629.36 : x
2. Step 2: Convert to fraction form
   3,940.72/5,889.54 = 3,629.36/x
3. Step 3: Cross multiply
   3,940.72x = 5,889.54 × 3,629.36
4. Step 4: Simplify right side
   3,940.72x = 21,375,260.89
5. Step 5: Solve for x
   x = 21,375,260.89/3,940.72
6. Step 6: Final answer
   x = 5,424.20