Finding the Fourth Proportional to 2,216.54, 3,325.74 and 830.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,216.54 : 3,325.74 = 830.48 : x
2. Step 2: Convert to fraction form
   2,216.54/3,325.74 = 830.48/x
3. Step 3: Cross multiply
   2,216.54x = 3,325.74 × 830.48
4. Step 4: Simplify right side
   2,216.54x = 2,761,960.56
5. Step 5: Solve for x
   x = 2,761,960.56/2,216.54
6. Step 6: Final answer
   x = 1,246.07