Finding the Fourth Proportional to 3,601.37, 5,389.86 and 2,215.59

Step by Step Solution

1. Step 1: Write the proportion equation
   3,601.37 : 5,389.86 = 2,215.59 : x
2. Step 2: Convert to fraction form
   3,601.37/5,389.86 = 2,215.59/x
3. Step 3: Cross multiply
   3,601.37x = 5,389.86 × 2,215.59
4. Step 4: Simplify right side
   3,601.37x = 11,941,719.92
5. Step 5: Solve for x
   x = 11,941,719.92/3,601.37
6. Step 6: Final answer
   x = 3,315.88