Finding the Fourth Proportional to 3,866.54, 5,372.84 and 3,826.40

Step by Step Solution

1. Step 1: Write the proportion equation
   3,866.54 : 5,372.84 = 3,826.40 : x
2. Step 2: Convert to fraction form
   3,866.54/5,372.84 = 3,826.40/x
3. Step 3: Cross multiply
   3,866.54x = 5,372.84 × 3,826.40
4. Step 4: Simplify right side
   3,866.54x = 20,558,634.98
5. Step 5: Solve for x
   x = 20,558,634.98/3,866.54
6. Step 6: Final answer
   x = 5,317.06