Finding the Fourth Proportional to 1,074.87, 1,613.18 and 459.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,074.87 : 1,613.18 = 459.27 : x
2. Step 2: Convert to fraction form
   1,074.87/1,613.18 = 459.27/x
3. Step 3: Cross multiply
   1,074.87x = 1,613.18 × 459.27
4. Step 4: Simplify right side
   1,074.87x = 740,886.33
5. Step 5: Solve for x
   x = 740,886.33/1,074.87
6. Step 6: Final answer
   x = 689.28