Finding the Fourth Proportional to 2,608.78, 3,596.40 and 1,613.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,608.78 : 3,596.40 = 1,613.50 : x
2. Step 2: Convert to fraction form
   2,608.78/3,596.40 = 1,613.50/x
3. Step 3: Cross multiply
   2,608.78x = 3,596.40 × 1,613.50
4. Step 4: Simplify right side
   2,608.78x = 5,802,791.40
5. Step 5: Solve for x
   x = 5,802,791.40/2,608.78
6. Step 6: Final answer
   x = 2,224.33