Finding the Fourth Proportional to 8,438.98, 12,659.83 and 4,277.31

Step by Step Solution

1. Step 1: Write the proportion equation
   8,438.98 : 12,659.83 = 4,277.31 : x
2. Step 2: Convert to fraction form
   8,438.98/12,659.83 = 4,277.31/x
3. Step 3: Cross multiply
   8,438.98x = 12,659.83 × 4,277.31
4. Step 4: Simplify right side
   8,438.98x = 54,150,017.46
5. Step 5: Solve for x
   x = 54,150,017.46/8,438.98
6. Step 6: Final answer
   x = 6,416.65