Finding the Fourth Proportional to 2,219.52, 3,328.71 and 986.23

Step by Step Solution

1. Step 1: Write the proportion equation
   2,219.52 : 3,328.71 = 986.23 : x
2. Step 2: Convert to fraction form
   2,219.52/3,328.71 = 986.23/x
3. Step 3: Cross multiply
   2,219.52x = 3,328.71 × 986.23
4. Step 4: Simplify right side
   2,219.52x = 3,282,873.66
5. Step 5: Solve for x
   x = 3,282,873.66/2,219.52
6. Step 6: Final answer
   x = 1,479.09