Finding the Fourth Proportional to 3,909.75, 5,814.41 and 3,786.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,909.75 : 5,814.41 = 3,786.72 : x
2. Step 2: Convert to fraction form
   3,909.75/5,814.41 = 3,786.72/x
3. Step 3: Cross multiply
   3,909.75x = 5,814.41 × 3,786.72
4. Step 4: Simplify right side
   3,909.75x = 22,017,542.64
5. Step 5: Solve for x
   x = 22,017,542.64/3,909.75
6. Step 6: Final answer
   x = 5,631.45