Finding the Fourth Proportional to 2,618.58, 3,613.65 and 1,423.58

Step by Step Solution

1. Step 1: Write the proportion equation
   2,618.58 : 3,613.65 = 1,423.58 : x
2. Step 2: Convert to fraction form
   2,618.58/3,613.65 = 1,423.58/x
3. Step 3: Cross multiply
   2,618.58x = 3,613.65 × 1,423.58
4. Step 4: Simplify right side
   2,618.58x = 5,144,301.80
5. Step 5: Solve for x
   x = 5,144,301.80/2,618.58
6. Step 6: Final answer
   x = 1,964.54