Finding the Fourth Proportional to 1,616.83, 2,231.33 and 1,086.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,616.83 : 2,231.33 = 1,086.60 : x
2. Step 2: Convert to fraction form
   1,616.83/2,231.33 = 1,086.60/x
3. Step 3: Cross multiply
   1,616.83x = 2,231.33 × 1,086.60
4. Step 4: Simplify right side
   1,616.83x = 2,424,563.18
5. Step 5: Solve for x
   x = 2,424,563.18/1,616.83
6. Step 6: Final answer
   x = 1,499.58