Finding the Fourth Proportional to 2,618.64, 3,613.73 and 1,423.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,618.64 : 3,613.73 = 1,423.61 : x
2. Step 2: Convert to fraction form
   2,618.64/3,613.73 = 1,423.61/x
3. Step 3: Cross multiply
   2,618.64x = 3,613.73 × 1,423.61
4. Step 4: Simplify right side
   2,618.64x = 5,144,516.98
5. Step 5: Solve for x
   x = 5,144,516.98/2,618.64
6. Step 6: Final answer
   x = 1,964.58