Finding the Fourth Proportional to 7,229.72, 9,980.25 and 4,245.74

Step by Step Solution

1. Step 1: Write the proportion equation
   7,229.72 : 9,980.25 = 4,245.74 : x
2. Step 2: Convert to fraction form
   7,229.72/9,980.25 = 4,245.74/x
3. Step 3: Cross multiply
   7,229.72x = 9,980.25 × 4,245.74
4. Step 4: Simplify right side
   7,229.72x = 42,373,496.73
5. Step 5: Solve for x
   x = 42,373,496.73/7,229.72
6. Step 6: Final answer
   x = 5,861.02