Finding the Fourth Proportional to 2,080.82, 2,870.27 and 1,240.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,080.82 : 2,870.27 = 1,240.96 : x
2. Step 2: Convert to fraction form
   2,080.82/2,870.27 = 1,240.96/x
3. Step 3: Cross multiply
   2,080.82x = 2,870.27 × 1,240.96
4. Step 4: Simplify right side
   2,080.82x = 3,561,890.26
5. Step 5: Solve for x
   x = 3,561,890.26/2,080.82
6. Step 6: Final answer
   x = 1,711.77