Finding the Fourth Proportional to 3,984.88, 5,978.98 and 2,135.52

Step by Step Solution

1. Step 1: Write the proportion equation
   3,984.88 : 5,978.98 = 2,135.52 : x
2. Step 2: Convert to fraction form
   3,984.88/5,978.98 = 2,135.52/x
3. Step 3: Cross multiply
   3,984.88x = 5,978.98 × 2,135.52
4. Step 4: Simplify right side
   3,984.88x = 12,768,231.37
5. Step 5: Solve for x
   x = 12,768,231.37/3,984.88
6. Step 6: Final answer
   x = 3,204.17