Finding the Fourth Proportional to 2,522.21, 3,783.42 and 878.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,522.21 : 3,783.42 = 878.88 : x
2. Step 2: Convert to fraction form
   2,522.21/3,783.42 = 878.88/x
3. Step 3: Cross multiply
   2,522.21x = 3,783.42 × 878.88
4. Step 4: Simplify right side
   2,522.21x = 3,325,172.17
5. Step 5: Solve for x
   x = 3,325,172.17/2,522.21
6. Step 6: Final answer
   x = 1,318.36