Finding the Fourth Proportional to 6,103.49, 8,421.45 and 3,978.83

Step by Step Solution

1. Step 1: Write the proportion equation
   6,103.49 : 8,421.45 = 3,978.83 : x
2. Step 2: Convert to fraction form
   6,103.49/8,421.45 = 3,978.83/x
3. Step 3: Cross multiply
   6,103.49x = 8,421.45 × 3,978.83
4. Step 4: Simplify right side
   6,103.49x = 33,507,475.80
5. Step 5: Solve for x
   x = 33,507,475.80/6,103.49
6. Step 6: Final answer
   x = 5,489.89