Finding the Fourth Proportional to 6,426.69, 8,869.84 and 3,909.59

Step by Step Solution

1. Step 1: Write the proportion equation
   6,426.69 : 8,869.84 = 3,909.59 : x
2. Step 2: Convert to fraction form
   6,426.69/8,869.84 = 3,909.59/x
3. Step 3: Cross multiply
   6,426.69x = 8,869.84 × 3,909.59
4. Step 4: Simplify right side
   6,426.69x = 34,677,441.85
5. Step 5: Solve for x
   x = 34,677,441.85/6,426.69
6. Step 6: Final answer
   x = 5,395.85