Finding the Fourth Proportional to 2,451.89, 3,678.29 and 808.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,451.89 : 3,678.29 = 808.55 : x
2. Step 2: Convert to fraction form
   2,451.89/3,678.29 = 808.55/x
3. Step 3: Cross multiply
   2,451.89x = 3,678.29 × 808.55
4. Step 4: Simplify right side
   2,451.89x = 2,974,097.19
5. Step 5: Solve for x
   x = 2,974,097.19/2,451.89
6. Step 6: Final answer
   x = 1,212.98