Finding the Fourth Proportional to 2,080.80, 3,112.02 and 1,851.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,080.80 : 3,112.02 = 1,851.30 : x
2. Step 2: Convert to fraction form
   2,080.80/3,112.02 = 1,851.30/x
3. Step 3: Cross multiply
   2,080.80x = 3,112.02 × 1,851.30
4. Step 4: Simplify right side
   2,080.80x = 5,761,282.63
5. Step 5: Solve for x
   x = 5,761,282.63/2,080.80
6. Step 6: Final answer
   x = 2,768.78