Finding the Fourth Proportional to 3,986.01, 5,978.98 and 1,647.27

Step by Step Solution

1. Step 1: Write the proportion equation
   3,986.01 : 5,978.98 = 1,647.27 : x
2. Step 2: Convert to fraction form
   3,986.01/5,978.98 = 1,647.27/x
3. Step 3: Cross multiply
   3,986.01x = 5,978.98 × 1,647.27
4. Step 4: Simplify right side
   3,986.01x = 9,848,994.38
5. Step 5: Solve for x
   x = 9,848,994.38/3,986.01
6. Step 6: Final answer
   x = 2,470.89