Finding the Fourth Proportional to 6,365.53, 8,789.59 and 3,978.28

Step by Step Solution

1. Step 1: Write the proportion equation
   6,365.53 : 8,789.59 = 3,978.28 : x
2. Step 2: Convert to fraction form
   6,365.53/8,789.59 = 3,978.28/x
3. Step 3: Cross multiply
   6,365.53x = 8,789.59 × 3,978.28
4. Step 4: Simplify right side
   6,365.53x = 34,967,450.11
5. Step 5: Solve for x
   x = 34,967,450.11/6,365.53
6. Step 6: Final answer
   x = 5,493.25