Finding the Fourth Proportional to 3,951.12, 5,453.20 and 3,776.16

Step by Step Solution

1. Step 1: Write the proportion equation
   3,951.12 : 5,453.20 = 3,776.16 : x
2. Step 2: Convert to fraction form
   3,951.12/5,453.20 = 3,776.16/x
3. Step 3: Cross multiply
   3,951.12x = 5,453.20 × 3,776.16
4. Step 4: Simplify right side
   3,951.12x = 20,592,155.71
5. Step 5: Solve for x
   x = 20,592,155.71/3,951.12
6. Step 6: Final answer
   x = 5,211.73