Finding the Fourth Proportional to 1,609.41, 2,218.59 and 1,111.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,609.41 : 2,218.59 = 1,111.23 : x
2. Step 2: Convert to fraction form
   1,609.41/2,218.59 = 1,111.23/x
3. Step 3: Cross multiply
   1,609.41x = 2,218.59 × 1,111.23
4. Step 4: Simplify right side
   1,609.41x = 2,465,363.77
5. Step 5: Solve for x
   x = 2,465,363.77/1,609.41
6. Step 6: Final answer
   x = 1,531.84