Finding the Fourth Proportional to 2,215.02, 3,322.49 and 571.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,215.02 : 3,322.49 = 571.56 : x
2. Step 2: Convert to fraction form
   2,215.02/3,322.49 = 571.56/x
3. Step 3: Cross multiply
   2,215.02x = 3,322.49 × 571.56
4. Step 4: Simplify right side
   2,215.02x = 1,898,991.89
5. Step 5: Solve for x
   x = 1,898,991.89/2,215.02
6. Step 6: Final answer
   x = 857.32