Finding the Fourth Proportional to 2,216.17, 3,323.76 and 1,120.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,216.17 : 3,323.76 = 1,120.78 : x
2. Step 2: Convert to fraction form
   2,216.17/3,323.76 = 1,120.78/x
3. Step 3: Cross multiply
   2,216.17x = 3,323.76 × 1,120.78
4. Step 4: Simplify right side
   2,216.17x = 3,725,203.73
5. Step 5: Solve for x
   x = 3,725,203.73/2,216.17
6. Step 6: Final answer
   x = 1,680.92