Finding the Fourth Proportional to 1,608.25, 2,218.17 and 1,111.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,608.25 : 2,218.17 = 1,111.72 : x
2. Step 2: Convert to fraction form
   1,608.25/2,218.17 = 1,111.72/x
3. Step 3: Cross multiply
   1,608.25x = 2,218.17 × 1,111.72
4. Step 4: Simplify right side
   1,608.25x = 2,465,983.95
5. Step 5: Solve for x
   x = 2,465,983.95/1,608.25
6. Step 6: Final answer
   x = 1,533.33