Finding the Fourth Proportional to 2,219.72, 3,323.10 and 1,603.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,219.72 : 3,323.10 = 1,603.40 : x
2. Step 2: Convert to fraction form
   2,219.72/3,323.10 = 1,603.40/x
3. Step 3: Cross multiply
   2,219.72x = 3,323.10 × 1,603.40
4. Step 4: Simplify right side
   2,219.72x = 5,328,258.54
5. Step 5: Solve for x
   x = 5,328,258.54/2,219.72
6. Step 6: Final answer
   x = 2,400.42