Finding the Fourth Proportional to 2,821.58, 4,227.72 and 971.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,821.58 : 4,227.72 = 971.69 : x
2. Step 2: Convert to fraction form
   2,821.58/4,227.72 = 971.69/x
3. Step 3: Cross multiply
   2,821.58x = 4,227.72 × 971.69
4. Step 4: Simplify right side
   2,821.58x = 4,108,033.25
5. Step 5: Solve for x
   x = 4,108,033.25/2,821.58
6. Step 6: Final answer
   x = 1,455.93