Finding the Fourth Proportional to 2,215.48, 3,323.83 and 655.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,215.48 : 3,323.83 = 655.56 : x
2. Step 2: Convert to fraction form
   2,215.48/3,323.83 = 655.56/x
3. Step 3: Cross multiply
   2,215.48x = 3,323.83 × 655.56
4. Step 4: Simplify right side
   2,215.48x = 2,178,966.72
5. Step 5: Solve for x
   x = 2,178,966.72/2,215.48
6. Step 6: Final answer
   x = 983.52