Finding the Fourth Proportional to 1,659.91, 2,290.79 and 1,099.41

Step by Step Solution

1. Step 1: Write the proportion equation
   1,659.91 : 2,290.79 = 1,099.41 : x
2. Step 2: Convert to fraction form
   1,659.91/2,290.79 = 1,099.41/x
3. Step 3: Cross multiply
   1,659.91x = 2,290.79 × 1,099.41
4. Step 4: Simplify right side
   1,659.91x = 2,518,500.48
5. Step 5: Solve for x
   x = 2,518,500.48/1,659.91
6. Step 6: Final answer
   x = 1,517.25