Finding the Fourth Proportional to 2,040.51, 3,061.77 and 808.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,040.51 : 3,061.77 = 808.80 : x
2. Step 2: Convert to fraction form
   2,040.51/3,061.77 = 808.80/x
3. Step 3: Cross multiply
   2,040.51x = 3,061.77 × 808.80
4. Step 4: Simplify right side
   2,040.51x = 2,476,359.58
5. Step 5: Solve for x
   x = 2,476,359.58/2,040.51
6. Step 6: Final answer
   x = 1,213.60