Finding the Fourth Proportional to 2,418.56, 3,624.64 and 878.08

Step by Step Solution

1. Step 1: Write the proportion equation
   2,418.56 : 3,624.64 = 878.08 : x
2. Step 2: Convert to fraction form
   2,418.56/3,624.64 = 878.08/x
3. Step 3: Cross multiply
   2,418.56x = 3,624.64 × 878.08
4. Step 4: Simplify right side
   2,418.56x = 3,182,723.89
5. Step 5: Solve for x
   x = 3,182,723.89/2,418.56
6. Step 6: Final answer
   x = 1,315.96