Finding the Fourth Proportional to 5,616.78, 8,427.69 and 3,969.42

Step by Step Solution

1. Step 1: Write the proportion equation
   5,616.78 : 8,427.69 = 3,969.42 : x
2. Step 2: Convert to fraction form
   5,616.78/8,427.69 = 3,969.42/x
3. Step 3: Cross multiply
   5,616.78x = 8,427.69 × 3,969.42
4. Step 4: Simplify right side
   5,616.78x = 33,453,041.24
5. Step 5: Solve for x
   x = 33,453,041.24/5,616.78
6. Step 6: Final answer
   x = 5,955.91