Finding the Fourth Proportional to 2,613.67, 3,608.55 and 1,620

Step by Step Solution

1. Step 1: Write the proportion equation
   2,613.67 : 3,608.55 = 1,620 : x
2. Step 2: Convert to fraction form
   2,613.67/3,608.55 = 1,620/x
3. Step 3: Cross multiply
   2,613.67x = 3,608.55 × 1,620
4. Step 4: Simplify right side
   2,613.67x = 5,845,851
5. Step 5: Solve for x
   x = 5,845,851/2,613.67
6. Step 6: Final answer
   x = 2,236.65