Finding the Fourth Proportional to 2,079.50, 3,119.60 and 1,039.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,079.50 : 3,119.60 = 1,039.55 : x
2. Step 2: Convert to fraction form
   2,079.50/3,119.60 = 1,039.55/x
3. Step 3: Cross multiply
   2,079.50x = 3,119.60 × 1,039.55
4. Step 4: Simplify right side
   2,079.50x = 3,242,967.18
5. Step 5: Solve for x
   x = 3,242,967.18/2,079.50
6. Step 6: Final answer
   x = 1,559.50