Finding the Fourth Proportional to 2,540.01, 3,810.15 and 808.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,540.01 : 3,810.15 = 808.50 : x
2. Step 2: Convert to fraction form
   2,540.01/3,810.15 = 808.50/x
3. Step 3: Cross multiply
   2,540.01x = 3,810.15 × 808.50
4. Step 4: Simplify right side
   2,540.01x = 3,080,506.28
5. Step 5: Solve for x
   x = 3,080,506.28/2,540.01
6. Step 6: Final answer
   x = 1,212.79