Finding the Fourth Proportional to 2,578.48, 3,864.54 and 1,016.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,578.48 : 3,864.54 = 1,016.91 : x
2. Step 2: Convert to fraction form
   2,578.48/3,864.54 = 1,016.91/x
3. Step 3: Cross multiply
   2,578.48x = 3,864.54 × 1,016.91
4. Step 4: Simplify right side
   2,578.48x = 3,929,889.37
5. Step 5: Solve for x
   x = 3,929,889.37/2,578.48
6. Step 6: Final answer
   x = 1,524.11