Finding the Fourth Proportional to 1,217.27, 1,826.72 and 447.77

Step by Step Solution

1. Step 1: Write the proportion equation
   1,217.27 : 1,826.72 = 447.77 : x
2. Step 2: Convert to fraction form
   1,217.27/1,826.72 = 447.77/x
3. Step 3: Cross multiply
   1,217.27x = 1,826.72 × 447.77
4. Step 4: Simplify right side
   1,217.27x = 817,958.69
5. Step 5: Solve for x
   x = 817,958.69/1,217.27
6. Step 6: Final answer
   x = 671.96