Finding the Fourth Proportional to 3,978.04, 5,969.46 and 3,159.16

Step by Step Solution

1. Step 1: Write the proportion equation
   3,978.04 : 5,969.46 = 3,159.16 : x
2. Step 2: Convert to fraction form
   3,978.04/5,969.46 = 3,159.16/x
3. Step 3: Cross multiply
   3,978.04x = 5,969.46 × 3,159.16
4. Step 4: Simplify right side
   3,978.04x = 18,858,479.25
5. Step 5: Solve for x
   x = 18,858,479.25/3,978.04
6. Step 6: Final answer
   x = 4,740.65