Finding the Fourth Proportional to 3,938.72, 5,886.56 and 3,627.36

Step by Step Solution

1. Step 1: Write the proportion equation
   3,938.72 : 5,886.56 = 3,627.36 : x
2. Step 2: Convert to fraction form
   3,938.72/5,886.56 = 3,627.36/x
3. Step 3: Cross multiply
   3,938.72x = 5,886.56 × 3,627.36
4. Step 4: Simplify right side
   3,938.72x = 21,352,672.28
5. Step 5: Solve for x
   x = 21,352,672.28/3,938.72
6. Step 6: Final answer
   x = 5,421.22