Finding the Fourth Proportional to 2,612.20, 3,603.72 and 1,616.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,612.20 : 3,603.72 = 1,616.80 : x
2. Step 2: Convert to fraction form
   2,612.20/3,603.72 = 1,616.80/x
3. Step 3: Cross multiply
   2,612.20x = 3,603.72 × 1,616.80
4. Step 4: Simplify right side
   2,612.20x = 5,826,494.50
5. Step 5: Solve for x
   x = 5,826,494.50/2,612.20
6. Step 6: Final answer
   x = 2,230.49