Finding the Fourth Proportional to 2,522.24, 3,784.20 and 878.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,522.24 : 3,784.20 = 878.72 : x
2. Step 2: Convert to fraction form
   2,522.24/3,784.20 = 878.72/x
3. Step 3: Cross multiply
   2,522.24x = 3,784.20 × 878.72
4. Step 4: Simplify right side
   2,522.24x = 3,325,252.22
5. Step 5: Solve for x
   x = 3,325,252.22/2,522.24
6. Step 6: Final answer
   x = 1,318.37