Finding the Fourth Proportional to 2,218.46, 3,328.83 and 986.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,218.46 : 3,328.83 = 986.72 : x
2. Step 2: Convert to fraction form
   2,218.46/3,328.83 = 986.72/x
3. Step 3: Cross multiply
   2,218.46x = 3,328.83 × 986.72
4. Step 4: Simplify right side
   2,218.46x = 3,284,606.49
5. Step 5: Solve for x
   x = 3,284,606.49/2,218.46
6. Step 6: Final answer
   x = 1,480.58