Finding the Fourth Proportional to 2,613.35, 3,608.13 and 1,620.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,613.35 : 3,608.13 = 1,620.09 : x
2. Step 2: Convert to fraction form
   2,613.35/3,608.13 = 1,620.09/x
3. Step 3: Cross multiply
   2,613.35x = 3,608.13 × 1,620.09
4. Step 4: Simplify right side
   2,613.35x = 5,845,495.33
5. Step 5: Solve for x
   x = 5,845,495.33/2,613.35
6. Step 6: Final answer
   x = 2,236.79