Finding the Fourth Proportional to 1,073.30, 1,609.32 and 456.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,073.30 : 1,609.32 = 456.69 : x
2. Step 2: Convert to fraction form
   1,073.30/1,609.32 = 456.69/x
3. Step 3: Cross multiply
   1,073.30x = 1,609.32 × 456.69
4. Step 4: Simplify right side
   1,073.30x = 734,956.48
5. Step 5: Solve for x
   x = 734,956.48/1,073.30
6. Step 6: Final answer
   x = 684.76