Finding the Fourth Proportional to 5,343.78, 8,018.69 and 2,878.54

Step by Step Solution

1. Step 1: Write the proportion equation
   5,343.78 : 8,018.69 = 2,878.54 : x
2. Step 2: Convert to fraction form
   5,343.78/8,018.69 = 2,878.54/x
3. Step 3: Cross multiply
   5,343.78x = 8,018.69 × 2,878.54
4. Step 4: Simplify right side
   5,343.78x = 23,082,119.91
5. Step 5: Solve for x
   x = 23,082,119.91/5,343.78
6. Step 6: Final answer
   x = 4,319.44