Finding the Fourth Proportional to 3,968.76, 5,945.88 and 3,531.36

Step by Step Solution

1. Step 1: Write the proportion equation
   3,968.76 : 5,945.88 = 3,531.36 : x
2. Step 2: Convert to fraction form
   3,968.76/5,945.88 = 3,531.36/x
3. Step 3: Cross multiply
   3,968.76x = 5,945.88 × 3,531.36
4. Step 4: Simplify right side
   3,968.76x = 20,997,042.80
5. Step 5: Solve for x
   x = 20,997,042.80/3,968.76
6. Step 6: Final answer
   x = 5,290.58