Finding the Fourth Proportional to 2,079.74, 2,870.39 and 1,240.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,079.74 : 2,870.39 = 1,240.48 : x
2. Step 2: Convert to fraction form
   2,079.74/2,870.39 = 1,240.48/x
3. Step 3: Cross multiply
   2,079.74x = 2,870.39 × 1,240.48
4. Step 4: Simplify right side
   2,079.74x = 3,560,640.83
5. Step 5: Solve for x
   x = 3,560,640.83/2,079.74
6. Step 6: Final answer
   x = 1,712.06