Finding the Fourth Proportional to 1,105.58, 1,658.91 and 456.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,105.58 : 1,658.91 = 456.50 : x
2. Step 2: Convert to fraction form
   1,105.58/1,658.91 = 456.50/x
3. Step 3: Cross multiply
   1,105.58x = 1,658.91 × 456.50
4. Step 4: Simplify right side
   1,105.58x = 757,292.42
5. Step 5: Solve for x
   x = 757,292.42/1,105.58
6. Step 6: Final answer
   x = 684.97