Finding the Fourth Proportional to 5,706.72, 8,563.32 and 3,520.80

Step by Step Solution

1. Step 1: Write the proportion equation
   5,706.72 : 8,563.32 = 3,520.80 : x
2. Step 2: Convert to fraction form
   5,706.72/8,563.32 = 3,520.80/x
3. Step 3: Cross multiply
   5,706.72x = 8,563.32 × 3,520.80
4. Step 4: Simplify right side
   5,706.72x = 30,149,737.06
5. Step 5: Solve for x
   x = 30,149,737.06/5,706.72
6. Step 6: Final answer
   x = 5,283.20