Finding the Fourth Proportional to 2,540.32, 3,810.96 and 808.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,540.32 : 3,810.96 = 808.96 : x
2. Step 2: Convert to fraction form
   2,540.32/3,810.96 = 808.96/x
3. Step 3: Cross multiply
   2,540.32x = 3,810.96 × 808.96
4. Step 4: Simplify right side
   2,540.32x = 3,082,914.20
5. Step 5: Solve for x
   x = 3,082,914.20/2,540.32
6. Step 6: Final answer
   x = 1,213.59