Finding the Fourth Proportional to 2,215.31, 3,323.15 and 571.84

Step by Step Solution

1. Step 1: Write the proportion equation
   2,215.31 : 3,323.15 = 571.84 : x
2. Step 2: Convert to fraction form
   2,215.31/3,323.15 = 571.84/x
3. Step 3: Cross multiply
   2,215.31x = 3,323.15 × 571.84
4. Step 4: Simplify right side
   2,215.31x = 1,900,310.10
5. Step 5: Solve for x
   x = 1,900,310.10/2,215.31
6. Step 6: Final answer
   x = 857.81