Finding the Fourth Proportional to 2,522.27, 3,783.61 and 878.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,522.27 : 3,783.61 = 878.78 : x
2. Step 2: Convert to fraction form
   2,522.27/3,783.61 = 878.78/x
3. Step 3: Cross multiply
   2,522.27x = 3,783.61 × 878.78
4. Step 4: Simplify right side
   2,522.27x = 3,324,971.35
5. Step 5: Solve for x
   x = 3,324,971.35/2,522.27
6. Step 6: Final answer
   x = 1,318.24