Finding the Fourth Proportional to 2,258.17, 3,388.55 and 1,218.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,258.17 : 3,388.55 = 1,218.16 : x
2. Step 2: Convert to fraction form
   2,258.17/3,388.55 = 1,218.16/x
3. Step 3: Cross multiply
   2,258.17x = 3,388.55 × 1,218.16
4. Step 4: Simplify right side
   2,258.17x = 4,127,796.07
5. Step 5: Solve for x
   x = 4,127,796.07/2,258.17
6. Step 6: Final answer
   x = 1,827.94