Finding the Fourth Proportional to 2,079.32, 2,868.18 and 1,239.49

Step by Step Solution

1. Step 1: Write the proportion equation
   2,079.32 : 2,868.18 = 1,239.49 : x
2. Step 2: Convert to fraction form
   2,079.32/2,868.18 = 1,239.49/x
3. Step 3: Cross multiply
   2,079.32x = 2,868.18 × 1,239.49
4. Step 4: Simplify right side
   2,079.32x = 3,555,066.09
5. Step 5: Solve for x
   x = 3,555,066.09/2,079.32
6. Step 6: Final answer
   x = 1,709.73