Finding the Fourth Proportional to 2,215.98, 3,323.34 and 656.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,215.98 : 3,323.34 = 656.10 : x
2. Step 2: Convert to fraction form
   2,215.98/3,323.34 = 656.10/x
3. Step 3: Cross multiply
   2,215.98x = 3,323.34 × 656.10
4. Step 4: Simplify right side
   2,215.98x = 2,180,443.37
5. Step 5: Solve for x
   x = 2,180,443.37/2,215.98
6. Step 6: Final answer
   x = 983.96