Finding the Fourth Proportional to 3,984.20, 5,978.94 and 3,953.42

Step by Step Solution

1. Step 1: Write the proportion equation
   3,984.20 : 5,978.94 = 3,953.42 : x
2. Step 2: Convert to fraction form
   3,984.20/5,978.94 = 3,953.42/x
3. Step 3: Cross multiply
   3,984.20x = 5,978.94 × 3,953.42
4. Step 4: Simplify right side
   3,984.20x = 23,637,283.43
5. Step 5: Solve for x
   x = 23,637,283.43/3,984.20
6. Step 6: Final answer
   x = 5,932.75