Finding the Fourth Proportional to 6,800.40, 9,384.72 and 3,816.12

Step by Step Solution

1. Step 1: Write the proportion equation
   6,800.40 : 9,384.72 = 3,816.12 : x
2. Step 2: Convert to fraction form
   6,800.40/9,384.72 = 3,816.12/x
3. Step 3: Cross multiply
   6,800.40x = 9,384.72 × 3,816.12
4. Step 4: Simplify right side
   6,800.40x = 35,813,217.69
5. Step 5: Solve for x
   x = 35,813,217.69/6,800.40
6. Step 6: Final answer
   x = 5,266.34