Finding the Fourth Proportional to 2,451.78, 3,676.89 and 808.02

Step by Step Solution

1. Step 1: Write the proportion equation
   2,451.78 : 3,676.89 = 808.02 : x
2. Step 2: Convert to fraction form
   2,451.78/3,676.89 = 808.02/x
3. Step 3: Cross multiply
   2,451.78x = 3,676.89 × 808.02
4. Step 4: Simplify right side
   2,451.78x = 2,971,000.66
5. Step 5: Solve for x
   x = 2,971,000.66/2,451.78
6. Step 6: Final answer
   x = 1,211.77