Finding the Fourth Proportional to 3,790.21, 5,664.18 and 3,579.61

Step by Step Solution

1. Step 1: Write the proportion equation
   3,790.21 : 5,664.18 = 3,579.61 : x
2. Step 2: Convert to fraction form
   3,790.21/5,664.18 = 3,579.61/x
3. Step 3: Cross multiply
   3,790.21x = 5,664.18 × 3,579.61
4. Step 4: Simplify right side
   3,790.21x = 20,275,555.37
5. Step 5: Solve for x
   x = 20,275,555.37/3,790.21
6. Step 6: Final answer
   x = 5,349.45