Finding the Fourth Proportional to 5,153.21, 7,107.31 and 3,578.57

Step by Step Solution

1. Step 1: Write the proportion equation
   5,153.21 : 7,107.31 = 3,578.57 : x
2. Step 2: Convert to fraction form
   5,153.21/7,107.31 = 3,578.57/x
3. Step 3: Cross multiply
   5,153.21x = 7,107.31 × 3,578.57
4. Step 4: Simplify right side
   5,153.21x = 25,434,006.35
5. Step 5: Solve for x
   x = 25,434,006.35/5,153.21
6. Step 6: Final answer
   x = 4,935.57