Finding the Fourth Proportional to 7,240.02, 9,993.59 and 4,255.78

Step by Step Solution

1. Step 1: Write the proportion equation
   7,240.02 : 9,993.59 = 4,255.78 : x
2. Step 2: Convert to fraction form
   7,240.02/9,993.59 = 4,255.78/x
3. Step 3: Cross multiply
   7,240.02x = 9,993.59 × 4,255.78
4. Step 4: Simplify right side
   7,240.02x = 42,530,520.45
5. Step 5: Solve for x
   x = 42,530,520.45/7,240.02
6. Step 6: Final answer
   x = 5,874.37