Finding the Fourth Proportional to 3,859.56, 5,329.26 and 3,564.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,859.56 : 5,329.26 = 3,564.72 : x
2. Step 2: Convert to fraction form
   3,859.56/5,329.26 = 3,564.72/x
3. Step 3: Cross multiply
   3,859.56x = 5,329.26 × 3,564.72
4. Step 4: Simplify right side
   3,859.56x = 18,997,319.71
5. Step 5: Solve for x
   x = 18,997,319.71/3,859.56
6. Step 6: Final answer
   x = 4,922.15