Finding the Fourth Proportional to 4,128.69, 6,187.55 and 3,578.29

Step by Step Solution

1. Step 1: Write the proportion equation
   4,128.69 : 6,187.55 = 3,578.29 : x
2. Step 2: Convert to fraction form
   4,128.69/6,187.55 = 3,578.29/x
3. Step 3: Cross multiply
   4,128.69x = 6,187.55 × 3,578.29
4. Step 4: Simplify right side
   4,128.69x = 22,140,848.29
5. Step 5: Solve for x
   x = 22,140,848.29/4,128.69
6. Step 6: Final answer
   x = 5,362.68