Finding the Fourth Proportional to 2,217.55, 3,327.09 and 985.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,217.55 : 3,327.09 = 985.82 : x
2. Step 2: Convert to fraction form
   2,217.55/3,327.09 = 985.82/x
3. Step 3: Cross multiply
   2,217.55x = 3,327.09 × 985.82
4. Step 4: Simplify right side
   2,217.55x = 3,279,910.25
5. Step 5: Solve for x
   x = 3,279,910.25/2,217.55
6. Step 6: Final answer
   x = 1,479.07