Finding the Fourth Proportional to 2,452.42, 3,678.78 and 808.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,452.42 : 3,678.78 = 808.98 : x
2. Step 2: Convert to fraction form
   2,452.42/3,678.78 = 808.98/x
3. Step 3: Cross multiply
   2,452.42x = 3,678.78 × 808.98
4. Step 4: Simplify right side
   2,452.42x = 2,976,059.03
5. Step 5: Solve for x
   x = 2,976,059.03/2,452.42
6. Step 6: Final answer
   x = 1,213.52