Finding the Fourth Proportional to 3,603.55, 5,408.70 and 2,219.59

Step by Step Solution

1. Step 1: Write the proportion equation
   3,603.55 : 5,408.70 = 2,219.59 : x
2. Step 2: Convert to fraction form
   3,603.55/5,408.70 = 2,219.59/x
3. Step 3: Cross multiply
   3,603.55x = 5,408.70 × 2,219.59
4. Step 4: Simplify right side
   3,603.55x = 12,005,096.43
5. Step 5: Solve for x
   x = 12,005,096.43/3,603.55
6. Step 6: Final answer
   x = 3,331.46