Finding the Fourth Proportional to 1,105.72, 1,658.45 and 284.00

Step by Step Solution

1. Step 1: Write the proportion equation
   1,105.72 : 1,658.45 = 284.00 : x
2. Step 2: Convert to fraction form
   1,105.72/1,658.45 = 284.00/x
3. Step 3: Cross multiply
   1,105.72x = 1,658.45 × 284.00
4. Step 4: Simplify right side
   1,105.72x = 470,992.22
5. Step 5: Solve for x
   x = 470,992.22/1,105.72
6. Step 6: Final answer
   x = 425.96