Finding the Fourth Proportional to 2,659.48, 3,988.05 and 1,099.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,659.48 : 3,988.05 = 1,099.42 : x
2. Step 2: Convert to fraction form
   2,659.48/3,988.05 = 1,099.42/x
3. Step 3: Cross multiply
   2,659.48x = 3,988.05 × 1,099.42
4. Step 4: Simplify right side
   2,659.48x = 4,384,541.93
5. Step 5: Solve for x
   x = 4,384,541.93/2,659.48
6. Step 6: Final answer
   x = 1,648.65