Finding the Fourth Proportional to 3,868.20, 5,789.34 and 3,816.36

Step by Step Solution

1. Step 1: Write the proportion equation
   3,868.20 : 5,789.34 = 3,816.36 : x
2. Step 2: Convert to fraction form
   3,868.20/5,789.34 = 3,816.36/x
3. Step 3: Cross multiply
   3,868.20x = 5,789.34 × 3,816.36
4. Step 4: Simplify right side
   3,868.20x = 22,094,205.60
5. Step 5: Solve for x
   x = 22,094,205.60/3,868.20
6. Step 6: Final answer
   x = 5,711.75