Finding the Fourth Proportional to 2,821.62, 4,231.59 and 847.17

Step by Step Solution

1. Step 1: Write the proportion equation
   2,821.62 : 4,231.59 = 847.17 : x
2. Step 2: Convert to fraction form
   2,821.62/4,231.59 = 847.17/x
3. Step 3: Cross multiply
   2,821.62x = 4,231.59 × 847.17
4. Step 4: Simplify right side
   2,821.62x = 3,584,876.10
5. Step 5: Solve for x
   x = 3,584,876.10/2,821.62
6. Step 6: Final answer
   x = 1,270.50