Finding the Fourth Proportional to 3,978.72, 5,969.04 and 2,336.64

Step by Step Solution

1. Step 1: Write the proportion equation
   3,978.72 : 5,969.04 = 2,336.64 : x
2. Step 2: Convert to fraction form
   3,978.72/5,969.04 = 2,336.64/x
3. Step 3: Cross multiply
   3,978.72x = 5,969.04 × 2,336.64
4. Step 4: Simplify right side
   3,978.72x = 13,947,497.63
5. Step 5: Solve for x
   x = 13,947,497.63/3,978.72
6. Step 6: Final answer
   x = 3,505.52