Finding the Fourth Proportional to 1,608.09, 2,218.42 and 1,111.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,608.09 : 2,218.42 = 1,111.42 : x
2. Step 2: Convert to fraction form
   1,608.09/2,218.42 = 1,111.42/x
3. Step 3: Cross multiply
   1,608.09x = 2,218.42 × 1,111.42
4. Step 4: Simplify right side
   1,608.09x = 2,465,596.36
5. Step 5: Solve for x
   x = 2,465,596.36/1,608.09
6. Step 6: Final answer
   x = 1,533.25