Finding the Fourth Proportional to 2,215.40, 3,320.28 and 982.46

Step by Step Solution

1. Step 1: Write the proportion equation
   2,215.40 : 3,320.28 = 982.46 : x
2. Step 2: Convert to fraction form
   2,215.40/3,320.28 = 982.46/x
3. Step 3: Cross multiply
   2,215.40x = 3,320.28 × 982.46
4. Step 4: Simplify right side
   2,215.40x = 3,262,042.29
5. Step 5: Solve for x
   x = 3,262,042.29/2,215.40
6. Step 6: Final answer
   x = 1,472.44