Finding the Fourth Proportional to 2,613.56, 3,606.72 and 1,618.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,613.56 : 3,606.72 = 1,618.60 : x
2. Step 2: Convert to fraction form
   2,613.56/3,606.72 = 1,618.60/x
3. Step 3: Cross multiply
   2,613.56x = 3,606.72 × 1,618.60
4. Step 4: Simplify right side
   2,613.56x = 5,837,836.99
5. Step 5: Solve for x
   x = 5,837,836.99/2,613.56
6. Step 6: Final answer
   x = 2,233.67