Finding the Fourth Proportional to 2,080.32, 3,118.85 and 1,039.79

Step by Step Solution

1. Step 1: Write the proportion equation
   2,080.32 : 3,118.85 = 1,039.79 : x
2. Step 2: Convert to fraction form
   2,080.32/3,118.85 = 1,039.79/x
3. Step 3: Cross multiply
   2,080.32x = 3,118.85 × 1,039.79
4. Step 4: Simplify right side
   2,080.32x = 3,242,928.25
5. Step 5: Solve for x
   x = 3,242,928.25/2,080.32
6. Step 6: Final answer
   x = 1,558.86