Finding the Fourth Proportional to 2,540.19, 3,810.32 and 808.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,540.19 : 3,810.32 = 808.82 : x
2. Step 2: Convert to fraction form
   2,540.19/3,810.32 = 808.82/x
3. Step 3: Cross multiply
   2,540.19x = 3,810.32 × 808.82
4. Step 4: Simplify right side
   2,540.19x = 3,081,839.93
5. Step 5: Solve for x
   x = 3,081,839.93/2,540.19
6. Step 6: Final answer
   x = 1,213.23