Finding the Fourth Proportional to 2,522.55, 3,781.38 and 878.67

Step by Step Solution

1. Step 1: Write the proportion equation
   2,522.55 : 3,781.38 = 878.67 : x
2. Step 2: Convert to fraction form
   2,522.55/3,781.38 = 878.67/x
3. Step 3: Cross multiply
   2,522.55x = 3,781.38 × 878.67
4. Step 4: Simplify right side
   2,522.55x = 3,322,585.16
5. Step 5: Solve for x
   x = 3,322,585.16/2,522.55
6. Step 6: Final answer
   x = 1,317.15